1/11/2024 0 Comments Do people have purple eyes![]() It's usually not until age three that a child's true permanent eye color reveals itself. True eye color will be determined over time. Because melanin production does not begin at birth, babies' eyes appear blue. The more melanin produced, the darker the eye color will be. Your genes also determine your eye color by dictating how much (and where) melanin is produced in your iris. If you have blue eyes, that means you received blue alleles from both parents. If you received a blue allele and a brown allele, your eye color would be brown because brown is the dominant allele. Green alleles are dominant over blue alleles, and brown alleles are dominant over both blue and green alleles. Recessive alleles are only expressed if there is no dominant allele present.įor example, the alleles for eye color can be separated into blue, green, and brown. For each trait, one allele ( dominant) is expressed (the trait it represents appears), while the other allele ( recessive) is unexpressed (the trait it represents does not appear). If they are different, they are heterozygous. If the two alleles are the same, they are homozygous. For each trait you can inherit, there are two alleles. Genes are, in turn, made up of alleles that ultimately determine whether any particular characteristic will appear. ![]() The two main genes believed to be responsible are OCA2 and HERC2, both of which are part of chromosome 15. Scientists believe that as many as 16 different genes could play a role in determining eye color. These genes, which also come in pairs, determine many of your characteristics you will develop. When you were conceived, you inherited one chromosome from each parent to make each pair of your chromosomes.Ĭhromosomes are comprised of pieces of DNA called genes. The more important factor is pigment, which is determined by your genes.ĭeep inside the nucleus of your body's cells are 46 chromosomes, divided into 23 pairs. There are two main factors that help determine your eye color: the amount and pattern of dark brown pigment (called melanin) in the part of your eye called the iris and the way in which the iris scatters light that passes through the eye. ![]() How? They passed along their genes to you! If the eyes are the windows to the soul, then what color are your windows? Baby blue? Big and brown? Green or hazel? Have you ever WONDERed about how your eyes came to be the color they are?ĭid your parents pick out the color of your eyes? Not exactly, but they did play a big part in determining their color. ![]()
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