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What protein does the eye color gene encode?
The eye color gene encodes for a protein called OCA2, which plays a role in determining the color of the eyes.
Can a karyotype determine eye color?
A karyotype is chart that shows all the chormosomes paired up and in order. A karyotype cannot determine eye color but it can determine what colors that specific person carries and can pass down to the next generation. BUT to determine what the next generation eye color will look like, it is not possible yet, but you can do a punnett square and that will show you the possible choice(s).
How do nucleic acids help determine if you have brown eyes or blues eyes?
I will try to answer this as best as I can- though I'm not entirely sure what it is you're asking.Nucleic acids are what make up DNA and RNA. DNA and RNA is found on chromosomes from your parents. The DNA is made up of understood letters- A,T,C and G. The biology community uses these letters to help represent parts of the coding. RNA reads the DNA that codes for eye color and sends a message for the cell to start making protein accordingly. So, if the nucleic acid in which your DNA is made up of codes for blue eyes, you will get blue eyes, same thing for brown.
If the mother has dark brown eyes and her mother has green eyes and her father has brown eyes and the father has grey eyes and his mother has blue eyes and his father has brown what about there baby?
In short, probably brown. However... "Eye color is a complex trait that depends on the state of several interacting genes. The gene that usually decides the issue (blue eyes or brown eyes) is the OCA2 gene on chromosome 15. But it comes in different strengths. A person with a weak form of the OCA2 gene will have blue eyes. Likewise a person with a strong form will have brown eyes. The plot thickens, though, because an individual also has other eye-color genes that each has a say in the final eye-color outcome. For example, if one of these lesser genes is strong, it can make the weak form (blue) of OCA2 work much more effectively - almost like the strong form (brown). Then the eye color may be a light brown or muddy grey. In fact, the resulting color can be any shade of brown, hazel/green, or blue depending on the strengths of the interactions." quoting: http://www.usatoday.com/tech/columnist/aprilholladay/2004-10-14-wonderquest_x.htm This throws the BB bb argument out the window. While, yes, it is more likely that the child will have brown eyes, it is far from guaranteed. It is even possible for two blue eyed people, or one blue and one green, to have brown eyed babies. There is no real way of knowing exactly what will happen until the baby is born.
What protein does the eye color gene encode?
The eye color gene encodes for a protein called OCA2, which plays a role in determining the color of the eyes.
Genetically speaking blue eyes are?
determined by a variation in the OCA2 gene that affects the production of melanin in the iris. This mutation results in less melanin being produced, leading to the characteristic blue color of the eyes. An individual must inherit two copies of this gene variant to have blue eyes.
What protein does the eye color gene encode?
The eye color gene encodes for a protein called OCA2 (P gene), which helps determine the amount of melanin produced in the iris. Melanin is responsible for the color of the eyes, with more melanin resulting in darker eye color.
Can a karyotype determine eye color?
A karyotype is chart that shows all the chormosomes paired up and in order. A karyotype cannot determine eye color but it can determine what colors that specific person carries and can pass down to the next generation. BUT to determine what the next generation eye color will look like, it is not possible yet, but you can do a punnett square and that will show you the possible choice(s).
What do you think the possible alleles for eye color in humans?
The possible alleles for eye color in humans are typically variations of the genes that control the production of melanin, such as the OCA2 and HERC2 genes. Common alleles include those for brown, blue, green, and hazel eyes. The combination of these alleles contributes to the wide range of eye colors observed in the human population.
Is albinism polygenic?
Albinism is primarily caused by mutations in specific genes responsible for melanin production, such as TYR, OCA2, and TYRP1, indicating that it is not strictly polygenic. While multiple genes can influence the various forms of albinism and their associated traits, the condition itself is typically classified as a monogenic disorder due to its direct link to mutations in single genes. However, the expression of albinism can be affected by environmental and genetic factors, which adds complexity to its inheritance.
What type of variation is eye colour?
Eye color is an example of phenotypic variation, which refers to the observable traits of an organism resulting from the interaction of its genetic makeup (genotype) and environmental factors. This variation is primarily controlled by multiple genes, with the most significant being OCA2 and HERC2, influencing the amount and type of pigments produced in the iris. The range of eye colors, such as brown, blue, green, and hazel, illustrates the complex inheritance patterns and polygenic nature of this trait.
How many different types of albinism is there?
There are several types of albinism, with the most common being Oculocutaneous Albinism (OCA) and Ocular Albinism (OA). OCA is further classified into different subtypes (OCA1, OCA2, OCA3, and OCA4) based on the specific genes involved. Additionally, there are rarer forms such as Hermansky-Pudlak syndrome and Chédiak-Higashi syndrome, which can also include albinism as a feature. Overall, the total number of recognized types and subtypes can vary, but they primarily fall into these categories.
Can two blond haired blue eyed parents have a red haired brown eyed son?
Not 100% sure about the hair colour part of the question, but i can tell you that it is impossible for two blue eyed parents to have a brown eyed child. It is possible for one parent with brown eyes and one with blue eyes to have a blue eyed child though. The blue eye trait is caused by both parents having nothing other than the blue eyed gene which thereby means that if both parents only have blue eyed genes than their offspring can only have blue eyes. Two blue-eyed parents can have a child with brown eyes. Most of us learned the model for determining eye color that G.C. Davenport and C.B. Davenport devised in 1907. The Davenport model wrongly says brown eye color is always dominant over blue eye color, which means that two blue-eyed parents always have blue-eyed kids. We know better now. "Although not common, two blue-eyed parents can produce children with brown eyes," says Richard A. Sturm, a Principal Research Fellow at the Institute for Molecular Bioscience at the University of Queensland in Brisbane, Australia. Eye color is a complex trait that depends on the state of several interacting genes. The gene that usually decides the issue (blue eyes or brown eyes) is the OCA2 gene on chromosome 15. But it comes in different strengths. A person with a weak form of the OCA2 gene will have blue eyes. Likewise a person with a strong form will have brown eyes. The plot thickens, though, because an individual also has other eye-color genes that each has a say in the final eye-color outcome. For example, if one of these lesser genes is strong, it can make the weak form (blue) of OCA2 work much more effectively - almost like the strong form (brown). Then the eye color may be a light brown or muddy grey. In fact, the resulting color can be any shade of brown, hazel/green, or blue depending on the strengths of the interactions.
On what is eye color in humans dependent?
Eye color in humans is primarily determined by genetic factors that influence the amount and distribution of melanin in the iris. The main genes involved include OCA2 and HERC2, which regulate melanin production. Higher melanin levels typically result in darker eye colors, such as brown, while lower levels can lead to lighter colors like blue or green. Environmental factors and evolutionary adaptations may also play a role in the variation of eye color across different populations.
How many pairs of genes control skin color?
3-6
How do you get color in an eye?
Eye colours can range from the most common colour, brown, to the least common, green. Rare genetic mutations can even lead to unusual eye colours: black, red, or the appearance of violet. Eye colour is an inherited trait influenced by more than one gene.[9][10] These genes are being sought using associations to small changes in the genes themselves and in neighboring genes. These changes are known as single nucleotide polymorphisms or SNPs. The actual number of genes that contribute to eye color is currently unknown, but there are a few likely candidates. A study in 2009 found that it was possible to predict the color of eyes in Rotterdam with more than 90% accuracy for brown and blue, using just six SNPs (from six genes). [11] The gene OCA2 (OMIM: 203200), when in a variant form the gene causes the pink eye color and hypopigmentation common in human albinism. (The name of the gene is derived from the disorder it causes, oculocutaneous albinism type II.) Different SNPs within OCA2 are strongly associated with blue and green eyes as well as variations in freckling, mole counts, hair and skin tone. The polymorphisms may be in anOCA2 regulatory sequence, where they may influence the expression of the gene product, which in turn affects pigmentation.[8] A specific mutation within the HERC2 gene, a gene that regulates OCA2 expression, is partly responsible for blue eyes.[12] Other genes implicated in eye color variation are: SLC24A4 [13] and TYR.[13] Blue eyes with a brown spot, green eyes and gray eyes are caused by an entirely different part of the genome. As Eiberg said: "The SNP rs12913832 [of the Herc2 gene] is found to be associated with the brown and blue eye color, but this single DNA variation cannot explain all the brown eye color variation from dark brown over hazel to blue eyes with brown spots."Source: Wikipedia
