What are the two main genes associated with eye color?
Two of these genes, OCA2 and HERC2, play a significant role in eye color selection. Although the OCA2 gene produces the protein responsible for melanin, the HERC2 gene controls the OCA2 gene by turning its protein production on and off.
Does DNA code for eye color?
Lighter eye colors, such as blue and green, are found almost exclusively among people of European ancestry. Eye color is determined by variations in a person’s genes. Most of the genes associated with eye color are involved in the production, transport, or storage of a pigment called melanin.
Do alleles code for eye color?
These alleles are located on separate chromosomes, so they independently assort during the creation of gametes. Each person then has 4 total alleles that determine their eye color (in this simplified model). The B allele (brown) is always dominant over the G allele (green). The blue eye trait is always recessive.
What is the gene for GREY eyes?
It may be that the same gene is involved in gray eyes. The gene I am talking about is called OCA2. This gene gives the instructions for a protein, called P-protein that helps decide how much melanin is made. Different people can have different versions of this gene.
What nationality has green eyes?
Where Do Green Eyes Come From? Green-eyed people most commonly originate from northern and central parts of Europe, as well as some parts of Western Asia. For example, Ireland and Scotland both boast a whopping 86 percent of the population having blue or green eyes.
Is GREY an eye Colour?
Gray eye color is one of the loveliest and most uncommon, a trait shared by only 3% of the world’s population. The color and intensity of gray eyes varies from person to person and can include dark gray, gray-green and gray-blue.
Can 2 brown eyes make blue?
So a brown-eyed person may carry both a brown version and a non-brown version of the gene, and either copy may be passed to his children. Two brown-eyed parents (if both are heterozygous) can have a blue-eyed baby.
What allele is hazel eyes?
Each human has two genes for eye color – one Brown/Blue and one Green/Hazel. Brown is dominant over all other alleles. Green and hazel have incomplete dominance. The heterozygous allele combination Gg produces hazel eyes.
What Colour my eyes are?
The color of your eyes depends on how much of the pigment melanin you have in your iris—the colored part of your eyes. The more pigment you have, the darker your eyes will be. Blue, grey, and green eyes are lighter because they have less melanin in the iris. Most people in the world will end up with brown eyes.
Do purple eyes exist?
Violet is an actual but rare eye color that is a form of blue eyes. It requires a very specific type of structure to the iris to produce the type of light scattering of melanin pigment to create the violet appearance.
Is GREY eyes rarer than green?
The production of melanin in the iris is what influences eye color. More melanin produces a darker coloring, while less makes for lighter eyes. Green eyes are the rarest, but there exist anecdotal reports that gray eyes are even rarer. Eye color isn’t just a superfluous part of your appearance.