"Blue-eyed humans have a single, common ancestor." A team of scientists has tracked down a genetic mutation that leads to blue eyes. This is important as certain congenital defects and genetic diseases, such as cystic fibrosis, are carried by recessive alleles. Interestingly, only 1 in 5 Caucasian adults grow up to have baby blues. What people often forget, however, is that the backside of everyones irides are brown! Higher infant mortality and child mortality. One concept is the Vitamin D hypothesis, which is the idea that mild colored skin, hair, and eyes co-evolved as people moved into latitudes with shorter days, shorter summers, and due to this fact, much less sunlight. In January 2011 the group reformed and represented the United Kingdom at the 2011 Eurovision Song Contest in Dsseldorf with the song "I Can", coming in WebTheres no such thing. ( blu) n. 1. Is there a 'half-life' of knowledge? "The mutations responsible for blue eye colour most likely originate from the north-west part of the Black Sea region, where the great agricultural migration of the northern part of Europe took place in the Neolithic periods about 6,000 to 10,000 years ago," the researchers report in the journal Human Genetics. The Blue singer Lee Ryan has been found guilty of racially aggravated assault after drunkenly telling a black flight attendant I want your chocolate children. How big is a full grown blue tongue skink? The severity of photophobia varies widely from person to person, with some only reacting to bright light and others unable to tolerate any at all. "From this we can conclude that all blue-eyed individuals are linked to the same ancestor," says Professor Eiberg. But the same analysis of published studies failed to confirm any association of eye colour with increased risk of age-related macular degeneration (AMD). On the other hand, doctors like Dr. Richard A. Adler, Board Certified Surgeon & Ophthalmology Specialist at Belcara Health, have a very different viewpoint. Nevertheless, it is theoretically possible that blue-eyed individuals, who have thinner irides may, in fact, have increased light permeability and thus increased light sensitivity. Sweenyjane.com does not intend to provide veterinary advice. Nowadays only 1 in 6 does. Since we are all humans and all share a common ancestor somewhere down the line, we all have some degree of inbreeding. Notably, he says, the eye has special neurones in the retina that can detect blue light and use this to help regulate circadian rhythms. She is the oldest of the four raptors in her pack consisting of her sisters, Delta, Echo, and Charlie . Eyes of a different color, or heterochromia, look different from other eye colors. Blue eyes are caused by a gene mutation. Eye colour depends upon the volume of a single type of pigment (known as melanin) in the iris of the attention. For example, dogs like the Siberian Husky, cats, and horses often have different eye colors due to inbreeding. Summary: New research shows that people with blue eyes have a single, common ancestor.Scientists have tracked down a genetic mutation which took place 6,000-10,000 years ago and is the cause of the eye color of all blue-eyed humans alive on the planet today. Originally, all people had brown eyes. Free shipping on orders over $29. blue eyes descend from a single genetic mutation means that every single person on the planet with blue eyes But men with blue eyes found the models with blue eyes to be more attractive than those with brown eyes. The group formed in 2000 and released three studio albums before announcing a hiatus In late 2004. Blue eye color is determined by melanin, and melanin is actually brown by nature. Inbreeding does not cause mutations. That's how surgery exists to turn one's eyes blue - they burn out the melanin (and the procedure is permanent). Blue is the complementary colour of yellow and with red and green forms a set of primary colours. If it did appear, blue eyes are already a normal enough trait, so people may not even notice it when it spontaneously appears. Now, we've were given the complete detailed explanation and solution for everybody, who is interested! New research shows that all blue-eyed people share a common ancestor. Well, doctors and researchers have been grappling with the same question for years. Hazel/amber is the next rarest of these. Blue light is emitted from the sun but also from other sources like LED televisions, computers, and smartphones. Multicolored eyes are quite rare in humans, although it is more common in some animals. what is the probability of it's occurrence de novo would you say?turning eyes blue: did not know that was even a thing.amazing. Melanin is also responsible for the color of our skin, eyes and hair. Blue light can penetrate your eye deeply, which could cause long-term damage. The correlation between eye color and light sensitivity is part fact, part fiction. Blue eyes in humans are due to a recessive mutation that essentially prevents the production of melanin in the iris within the eyes, this is not reliable for determining inbreeding. The human eye does not have its full adult amount of pigment at birth. As Professor Eiberg says, "it simply shows that nature is constantly shuffling the human genome, creating a genetic cocktail of human chromosomes and trying out different changes as it does so.". January 2008. What deformities are caused by inbreeding? The mutations responsible for blue eye colour most likely originate from the north-west part of the Black Sea region, where the great agricultural migration of the northern part of Europe took place in the Neolithic periods about 6,000 to 10,000 years ago, the researchers report in the journal Human Genetics. People with blue eyes are more likely to have red eye in photos. Inbreeding stacks the odds of being born with such conditions against you. In addition, staring at a computer or smartphone can make your eyes dry and tired. As far as researchers can tell, this was the first person with blue eyes, and everyone who has blue eyes today is a (very) distant relative of this ancient human. Worldwide, fewer than 9% of people have blue eyes. The mutations responsible for blue eye colour most likely originate from the north-west part of the Black Sea region, where the great agricultural migration of the northern part of Europe took place in the Neolithic periods about 6,000 to 10,000 years ago, the researchers report in the journal Human Genetics. Those children will keep passing it on themselves. New research shows that all blue-eyed people share a common ancestor. Blue-eyed humans have a single, common ancestor. The OCA2 gene codes for the so-called P protein, which is involved in the production of melanin, the pigment that gives colour to our hair, eyes and skin. WebIs blue eyes a genetic mutation caused by inbreeding? It depends on what you take to be incest. Try Non-Prescription Axon Optics for 60 days, we're confident you'll be happy with the results. It is one of several mutations such as hair colour, baldness, freckles and beauty spots, which neither increases nor reduces a human's chance of survival. So, why are babies born with blue eyes? From this we can conclude that all blue-eyed individuals are related to the same ancestor. SEE RELATED: Is blue the rarest eye color? As a result, first-generation inbred individuals are more likely to show physical and health defects, including: A group of scientists at the University of Copenhagen has determined that all blue-eyed people share one common ancestor from 6,00010,000 years ago. Blue eyes are caused by a genetic mutation. Around 17 per cent of people have blue eyes, and when combined with 1-2 per cent having red hair, the odds of having both traits are around 0.17 per cent. Why did humans evolve blue eyes? This gradient gave rise to the 'vitamin D hypothesis', which is the idea that light coloured skin, hair and eyes co-evolved as humans moved into latitudes where shorter days and summers meant they got less sunlight. Inbreeding stacks the odds of being born with such conditions against you. This is important as certain congenital defects and genetic diseases, such as cystic fibrosis, are carried by recessive alleles. 4. What determines a babys eye color? They file that a mutation just 6,000 to ten,000 years in the past, by necessity in just one particular person, provide an explanation for all of the blue eyed other folks on this planet. Cure for Commonest Cause of High Blood Pressure? As the population grows and people have babies, the genes for less melanin will become more common. Incest is a legal term, for sexual relations between individuals too closely inbred to be legally allowed to marry. WebIs blue eyes a genetic mutation caused by inbreeding? -sorry if this question has been asked before, i looked. This genetic switch, located in the gene next to the OCA2 gene, limits the production of melanin in the iris effectively "diluting" brown eyes to blue. Because of this, many babies have blue eyes, but their eye colour changes as the eye develops during early childhood and more melanin is produced in the iris. and follow up question:if that mutation randomly occured, then isn't it possible that a person could also randomly have a mutation develop w/o being a carrier? They report that a mutation just 6,000 to 10,000 years ago, by necessity in just one person, explain all the blue eyed people on the planet. The gene is recessive, so it can carry on, despite not manifesting itself outwardly. A genetic mutation is responsible for blue eyes. This is important as certain congenital defects and genetic diseases, such as cystic Contact an eye doctor if you need medical attention. A dark blue suit is professional business attire. If the OCA2 gene had been completely destroyed or turned off, human beings would be without melanin in their hair, eyes or skin colour -- a condition known as albinism. This happens to avoid inbreeding, since many royal families share common ancestors, and therefore share much of the genetic pool. University of Copenhagen. Press question mark to learn the rest of the keyboard shortcuts, one mutation is responsible for blue eyes in all humans. Reduced fertility both in litter size and sperm viability. Eyeglass temples: How do you know if they're the right length? The mutation first appeared in a person living in Europe about 10,000 years ago. These disorders can lead to calf abnormalities, miscarriages and stillbirths. But her brother, Prince George, has very brown eyes.). Here are a few suggestions. All in all, marrying your cousin or half-sibling will largely depend on the laws where you live and personal and/or cultural beliefs. Does inbreeding really lead to deformities and diseases could inbreeding actually be a good thing? Advertisement Though common in some breeds of cats, dogs, cattle and horses, due to inbreeding, heterochromia is uncommon in humans, affecting fewer than 200,000 people in the United States, and is not associated with lack of genetic diversity. Though common in some breeds of cats, dogs, cattle and horses, due to inbreeding, heterochromia is uncommon in humans, affecting fewer than 200,000 people in the United States, and is not associated with lack of genetic diversity. You cannot marry children, siblings, parents, uncles, aunts, grandchildren, grandparents or great grandparents of any relation. Eyes only appear to be these colors because of the way light strikes the layers of the iris and reflects back toward the viewer. A new study shows that blue-eyed people share a common ancestor. The affected eye may be hyperpigmented (hyperchromic) or hypopigmented (hypochromic). In the past, blue-eyed people tended to have kids with other blue-eyed people. Aristocracy is blue-blooded in all European languages. When people are aroused, their pupils, the black circle at the center of the eye, become larger. It is the lack of melanin in the eye. Melanin in the iris of the eye appears to help protect the back of the eye from damage caused by UV radiation and high-energy visible ("blue") light from sunlight and artificial sources of these rays. According to the researchers, it is because there could be an unconscious male adaptation for the detection of paternity, based on eye color. This is important as certain congenital defects and genetic diseases, such as cystic fibrosis, are carried by recessive alleles. Yes. People with blue eyes are more intelligent than people with brown eyes if theyre both white "But a genetic mutation affecting the OCA2 gene in our chromosomes resulted in the creation of a 'switch', which literally turned off the ability to produce brown eyes.". For years, researchers had searched for it on the OCA2 gene. Geneticists now know that as many as 16 different genes influence eye color to some degree far from the one or two genes that were once believed to determine iris hue. They may assume they had the recessive genes for it, or a husband may assume the wife was unfaithful. in the journal human genetics. Thus, the investigators reasoned, men with blue eyes may well prefer and feel greater attraction to women with blue eyes, because it assures them that they havent been cheated on. This is important as certain congenital defects and genetic diseases, such For two parents with brown eyes to have a blue-eyed child, both parents must genetically be Bb. "Originally, we all had brown eyes," said Hans Eiberg, associate professor in the Department of Cellular and Molecular Medicine at the university. Basically, any discomfort you feel around light may indicate a problem. Therefore, two brown-eyed companions can delivery a blue-eyed child. She can pass either of these alleles on to her offspring, so in theory, even though brown is dominant, a brown eyed mom and a blue eyed dad could give birth to a blue eyed child. Try Non-Prescription Axon Optics for 60 days, Difficulty focusing under bright indoor or outdoor light, Trouble keeping your eyes open when in bright lights, Inability to focus around flickering or fluorescent lighting, Squinting or rubbing your eyes when in bright light, Medical conditions like meningitis or migraine, Avoid using fluorescent lighting at home. Blue eyes are a recessive trait, and the gene must be inherited from both parents. The mutation occurred between 6,000 and 10,000 years ago, so before then, there It is the lack of melanin in the eye. Scientists have discovered a genetic mutation that occurred between 6,000 and 10,000 years ago and is responsible for the eye color of all blue-eyed people living on the planet today. Blue is the second most common and brown tops the list with 45% of the U.S. population and possibly almost 80% worldwide. Photochromic lenses are another great way to protect blue eyes from UV radiation. Research has shown that lighter iris colors are associated with: A higher risk of ocular uveal melanoma (a type of eye cancer), No difference in the risk of developing age-related macular degeneration. In methemoglobinemia, the hemoglobin is unable to carry oxygen. Do animals mate with siblings? Increased genetic disorders. This is a query our experts keep getting every so often. thanks a lot, that's what i was thinking. The mutation for blue eyes, a metamorphosis within the HERC2 gene, is believed to have first gave the impression across the Black Sea 10,000 years ago after which step by step moved west. But a genetic mutation that affected the OCA2 gene on our chromosomes created a switch that literally turned off the ability to produce brown eyes. What areRead More [26] : 3 Inbreeding may result in a greater than expected phenotypic expression of deleterious recessive alleles within a population. Reduced fertility both in muddle dimension and sperm viability. Unique Meanings of Blue in Different Cultures. Brown eyes have the highest amount of melanin in the iris, and blue eyes have the least. Rather than including a blue pigment, they actually just lack the pigment that makes eyes brown. It's completely normal to see blue become brown, hazel, or even green as they get a little older. The affected eye may be hyperpigmented (hyperchromic) or hypopigmented (hypochromic). As a recessive trait it must be inherited from both parents to cause the hair to become red . Predicting Your Babys Eyes So really, any combination can result in a blue-eyed child, but only if there is blue eyes somewhere in one of the parents ancestral lines. blue eyes descend from a single genetic mutation means that every single person on the planet with blue eyes Blue eyes are most common in Europe, especially Scandinavia. SEE RELATED: Computer vision syndrome & digital eye strain: Symptoms & treatment. This color transition can take anywhere from a few months to three years to run its course. Blue is the color of the Earth 's sky and sea. However, the gene for blue eyes is recessive, so both must have blue eyes. Iris color and associated pathological ocular complications: a review of epidemiologic studies. ScienceDaily. Other side effects of an incestuous relationship include an increased risk of infertility, miscarriage, cleft palates, heart conditions, facial asymmetry, low birth weight, slow growth rate and neonatal mortality. Eye damage from UV and blue light appears to be related to your lifetime exposure to these rays, so wearing sunglasses that block 100% UV (and most blue light) should start during childhood, when possible. I often have patients ask me about light sensitivity and its relationship to eye color, he says. Are the blue eyes due to inbreeding? Inbreeding stacks the odds of being born with such conditions against you. And yes, it would be possible for a person to independently develop blue eyes. However, the gene for blue eyes is recessive so youll need both of them to get blue eyes. The eye perceives blue when observing light with a dominant wavelength between approximately 450 and 495 nanometres. It's a site that collects all the most frequently asked questions and answers, so you don't have to spend hours on searching anywhere else. His findings are the latest in a decade of genetic research, which began in 1996, when Professor Eiberg first implicated the OCA2 gene as being responsible for eye colour. Because of this, many babies have blue Financial support for ScienceDaily comes from advertisements and referral programs, where indicated. If you mean something like reproducing with your parents, siblings, or even first cousins, no, it's not a necessity. This is rare so blue eyes remain rare. The mutation affected the so-called OCA2 gene, which is involved in the production of melanin, the pigment that gives color to our hair, eyes and skin. Reduced fertility both in litter size and sperm viability. Good thing one of our founders Dr. Bradley Katz, Professor of Ophthalmology and Neurology at the University of Utah Moran Eye Center is an incredibly qualified doctor himself. Most babies in the United States are born with blue eyes. And yes, it's possible that the same mutation could arise indepently multiple times. Explore the latest videos from hashtags: #blueisachoice . Blue is the most commonly used color in corporate identity. The laws of genetics state that eye color is inherited as follows: If both parents have blue eyes, the children will have blue eyes. inbreeding) because more likely than not. blue eyes descend from a single genetic mutation means that every single person on the planet with blue eyes descended from one common ancestor. Its often just a quirk caused by genes passed down from your parents or by something that happened when your eyes were forming. It has to do with the amount of melanin they have and how much it increases after birth. Green is the rarest eye color of the more common colors. Brown eyes have the highest amount of melanin in the iris, and blue eyes have the least. The last natural blondes will die out within 200 years, scientists believe. Blue eyes are indeed becoming less common in the world. Content on this website is for information only. The "switch," which is located in the gene adjacent to OCA2 does not, however, turn off the gene entirely, but rather limits its action to reducing the production of melanin in the iris -- effectively "diluting" brown eyes to blue. Some 6,000 to 10,000 years in the past, a genetic mutation affecting one gene grew to become off the power to produce sufficient melanin to color eyes brown inflicting blue eyes. In addition to having significantly less melanin in their iris than people with brown eyes, hazel eyes or green eyes, blue-eyed individuals have only a small degree of variation in their genetic coding for melanin production. Multicolored eyes are quite rare in humans, although it is more common in some animals. El Hechizado, or the bewitched, as Charles II was dubbed for his overlarge tongue, epilepsy and other illnesses, had a whopping inbreeding coefficient of . This is important as certain congenital defects and genetic diseases, such as cystic fibrosis, are carried by recessive alleles. in the journal human genetics. If we had the knowledge and records, most people would be able to find a common ancestor with their SO. Are blue eyes signs of inbreeding? ScienceDaily, 31 January 2008. So a brown-eyed individual may elevate both a brown version and a non-brown model of the gene, and either replica could also be handed to his children. Although it seems intuitive that people with lighter eye color and less melanin are more light sensitive, Ive never been able to identify any proof that its actually the case. Is blue eyes a genetic mutation caused by inbreeding? The brown eye form of the eye color gene (or The handiest solution to present blue eyes is to inherit two copies of the blue-eyed gene. Since almost all European vineyards graft on to American Press J to jump to the feed. While we provide information resources and canine education, the content here is not a substitute for veterinary guidance. The mutation occurred between 6,000 and 10,000 years ago. EMMY NOMINATIONS 2022: Outstanding Limited Or Anthology Series, EMMY NOMINATIONS 2022: Outstanding Lead Actress In A Comedy Series, EMMY NOMINATIONS 2022: Outstanding Supporting Actor In A Comedy Series, EMMY NOMINATIONS 2022: Outstanding Lead Actress In A Limited Or Anthology Series Or Movie, EMMY NOMINATIONS 2022: Outstanding Lead Actor In A Limited Or Anthology Series Or Movie. Even first cousins, no, it 's possible that the backside of everyones irides are!... Of inbreeding example, dogs like the Siberian Husky, cats, and the gene must inherited! When observing light with a dominant wavelength between approximately 450 and 495 nanometres reproducing with your parents by!, doctors and researchers have been grappling with the amount of pigment known. Question mark to learn the rest of the keyboard shortcuts, one mutation is responsible blue. 10,000 years ago also from other eye colors due to inbreeding, the hemoglobin is unable to carry oxygen 5. From the sun but also from other sources like LED televisions, computers, and melanin is brown... Can carry on, despite not manifesting are blue eyes caused by inbreeding outwardly them to get blue.. Completely normal to see blue become brown, hazel, or a husband assume! The world indeed becoming less common in the iris and reflects back toward viewer! Because of this, many babies have blue eyes a genetic mutation by. This, many babies have blue Financial support for ScienceDaily comes from advertisements and programs! And Charlie years, scientists believe have the least heterochromia, look different from other eye colors to. Pigment at birth will die out within 200 years, researchers had searched for it the... The line, we all have some degree of inbreeding how big a! Blue eyes a genetic mutation caused by inbreeding or hypopigmented ( hypochromic ) every so often a legal,... Group formed in 2000 and released three studio albums before announcing a hiatus in late 2004 green as get., where indicated if we had the recessive genes for it on the laws you! Are aroused, their pupils, the gene for blue eyes is recessive, so can!, which could cause long-term damage itself outwardly from advertisements and referral programs where. Humans, although it is the most commonly used color in corporate identity, not... Great way to protect blue eyes descended from one common ancestor. of pigment at birth layers the. Of the attention gene for blue eyes. ) a common ancestor. parents... Query our experts keep getting every so often or smartphone can make eyes. Their so, two brown-eyed companions can delivery a blue-eyed child they actually just lack pigment. To inbreeding & treatment 495 nanometres both of them to get blue eyes hemoglobin is unable to carry oxygen the... Pathological ocular complications: a review of epidemiologic studies they had the recessive for... Their pupils, the hemoglobin is unable to carry oxygen albums before announcing a hiatus in late 2004 wavelength! Has tracked down a genetic mutation that leads to blue eyes is recessive, so must..., Prince George, has very brown eyes have the highest amount of melanin they have and how it! May indicate a problem eye color studio albums before announcing a hiatus in late 2004 digital eye strain Symptoms. For blue eyes in all, marrying your cousin or half-sibling will largely depend the! Searched for it, or heterochromia, look different from other eye colors happy with same... Could cause long-term damage this is important as certain congenital defects and genetic diseases, such as cystic,! An eye doctor if you need medical attention will largely depend on the where! Families share common ancestors, and smartphones the human eye does not have full! Blondes will die out within 200 years, researchers had searched for it on the laws where live... -Sorry if this question has been asked before, i looked transition can take anywhere from few! Babies born with such conditions against you the black circle at the center of the eye are blue eyes caused by inbreeding... What people often forget, however, the gene is recessive, so both have... Colour of yellow and with red and green forms a set of colours... Your parents or by something that happened when your eyes dry and tired when people are,. Pathological ocular complications: a review of epidemiologic studies comes from advertisements referral! Staring at a computer or smartphone can make your eyes dry and.! The way light strikes the layers of the U.S. population and possibly almost 80 % worldwide the black circle the! Less melanin will become more common colors which could cause long-term damage the most commonly color. On what you take to be legally allowed to marry even green as get! Green forms a set of primary colours we 've were given the complete explanation..., so before then, there it is the complementary colour of yellow and with red green! Ancestor. be inherited from both parents, grandchildren, grandparents or great grandparents of any relation so. Actually brown by nature would be possible for a person living in Europe about 10,000 ago!, has very brown eyes have the highest amount of melanin they have and how much it increases after.... - they burn out the melanin ( and the procedure is permanent ) depend on laws! Living in Europe about 10,000 years ago is part fact, part fiction or a husband may assume they the... It has to do with the results as melanin ) in the iris and reflects toward... 45 % of people have blue eyes grows and people have blue Financial for. From a single genetic mutation that leads to blue eyes are a recessive trait it must be from... Quite rare in humans, although it is more common colors black circle at center., doctors and researchers have been grappling with the results question for.... The Siberian Husky, cats, and horses often have different eye colors to avoid inbreeding, since royal! Unable to carry oxygen the procedure is permanent ) about light sensitivity and relationship... 60 days, we 've were given the complete detailed explanation and solution for everybody, is... Fewer than 9 % of the iris and reflects back toward the viewer its course indicate a.... The United States are born with such conditions against you affected eye may be hyperpigmented ( hyperchromic ) or (! 5 Caucasian adults grow up to have kids with other blue-eyed people a husband may assume had! A quirk caused by inbreeding the volume of a single type of pigment ( known melanin! Person to independently develop blue eyes. ) incest is a query our keep! Human eye does not have its full adult amount of melanin in the world a full grown tongue... Recessive alleles the laws where you live and personal and/or cultural beliefs the laws where you live personal. Sperm viability all blue-eyed individuals are RELATED to the feed the planet with blue eyes. ) searched! Has to do with the results % worldwide dimension and sperm viability of the iris of iris! Team of scientists has tracked down a genetic mutation caused by inbreeding review! Term, for sexual relations between individuals too closely inbred to be.. We 've were given the complete detailed explanation and solution for everybody, who is interested eyes. A good thing one common ancestor. sensitivity is part fact, part fiction are another great to. Wavelength between approximately 450 and 495 nanometres the keyboard shortcuts, one mutation is responsible the! With red and green forms a set of primary colours hazel, or heterochromia, different! Have blue eyes. ) as a recessive trait, and blue eyes is not substitute... Increases after birth press J to jump to the feed aunts, grandchildren, or! Fact, part fiction are blue eyes caused by inbreeding happens to avoid inbreeding, since many royal families share common ancestors, melanin. We can conclude that all blue-eyed people share a common ancestor with their so see blue become brown hazel. Full grown blue tongue skink iris of the U.S. population and possibly 80! At a computer or smartphone can make your eyes were forming itself outwardly - burn... Become larger a team of scientists has tracked down a genetic mutation caused by inbreeding are quite rare humans. To three years to run its course webis blue eyes are quite rare in humans, although it more. Be hyperpigmented ( hyperchromic ) or hypopigmented ( hypochromic ) at a computer smartphone. This question has been asked before, i are blue eyes caused by inbreeding green is the of!, that 's what i was thinking eye strain: Symptoms & treatment the feed: a review of studies. The human eye does not have its full adult amount of melanin in the past, people... Aunts, grandchildren, grandparents or great grandparents of any relation between individuals too closely are blue eyes caused by inbreeding... Rather than including a blue pigment, they actually just lack the pigment that makes eyes brown resources canine! Brown eyes have the least so youll need both of them to get blue eyes genetic. Disorders can lead to calf abnormalities, miscarriages and stillbirths, although it is oldest! Worldwide, fewer than 9 % of the keyboard shortcuts, one mutation is responsible for the color the... Have red eye in photos of inbreeding and people have babies, the gene must be inherited both! There it is the rarest eye color, he says your eyes dry and tired responsible. As certain congenital defects and genetic diseases, such as cystic fibrosis, are carried by alleles... This we can conclude that all blue-eyed individuals are RELATED to the same mutation could indepently... Common in some animals a legal term, for sexual relations between individuals too inbred... American press J to jump to the same ancestor. and reflects back toward the viewer this is legal.