Eye Color Genetics

If you and your mate have different eye colors, let’s  say yours are brown and your mate’s are blue and given that you do not have children yet, you most probably would wonder what rare eye color your child would have. Well, you cannot decide what eye color would your baby have, but your genes can! Your baby’s eye color will ultimately depend on a complex system of genes that combine in various ways to determine the color outcome.

Eye color is due to cellular pigmentation that is concentrated in the iris. Study shows that when babies get older, it is normal that their eye colors will also change. For example, a blue-eyed baby would normally become brown-eyed in the course of about 3 years due to melanin (brown pigment)  which accumulates with growth. In newborn infants, having inherent melanin in the eye occurs in rare cases.

A theory states that a brown gene normally dominates a green gene, while a green gene normally dominates a blue one. In this regard, the more pronounced the eye color is, the more it is expressed by a dominant gene. But this theory is not at all very acceptable. Brown-eyed and blue-eyed parents will not significantly produce a brown-eyed child. In rare cases brown-eyed parents will produce a blue-eyed child.

In extremely rare cases, on the other hand, blue-eyed parents can produce a brown-eyed child. The right biochemistry in human eye color genetics sometimes fail like if you have pigmentation problems, trauma, inflammation, genetic disorder, freckle of the iris or Horner’s syndrome and then there is a possibility that you can develop eyes with different colors.

You cannot make your eyes change their color, but studies shows that eye color can actually change. Your iris’ color integrity corresponds to how large or small your pupils are. The pigments in your iris spread out when your pupil enlarges. This results in a lighter shade of your eye. Subsequently, a darker eye color results if your pupil contracts causing the pigments to be pushed together.

Normally, eye color changes with age. In fact, 10 to 15 percent of Caucasians experience a change of eye color (either darker or lighter) as they grow older. If sudden change in eye color is observed, it is advised to seek medical attention immediately to see if it is due to a certain disease so that medication would be given early. Frustrated people use colored lenses to somehow temporarily change their eye color. However this is not always safe. It is best to consult an eye doctor first.

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