Eye color is a physical trait that is genetically determined. A favorite pastime for many expectant parents is documenting the eye color of grandparents and extended family members to attempt to predict the eye color of their baby. Any discussion of the inheritance of eye color requires a review of genetics. In basic terms, eye color is determined by the amount of a pigment called melanin that is in the iris of the eye. Brown eyes have lots of pigment, blue eyes very little. The amount of pigment is determined by a number of genes controlling pigment production. Generally speaking, brown is dominant, meaning that if one parent has brown eyes and the other has blue eyes, the baby will most likely have brown eyes. But the situation is really much more complicated than that.

Why blue eyes?

Eyes are said to be the most attractive part of a person. Personality of a person is also looked upon by the eye color or the eye they inherit. Eyes have always been a question to most of us. Basically how a baby is born with a different color eye when their parents do not inherit it. It is the melanin, a brown pigment molecule that colors the skin, hair and eyes also. It is deposited in the irises of the eyes. The iris is the colored part of the eye that controls the amount of light that is allowed to enter. Some of the animals are born with blue eyes, too, like that of kittens. Melanin generally is a protein just like other proteins, the amount that is coded in our genes. An iris contains a large amount of melanin which appear black or brown. Less melanin produces green, gray, or light brown eyes. If eyes contains very small amount of melanin they will appear blue or light gray. People with albinism have no melanin in their irises and their eyes may appear pink because the blood vessels in the back of their eyes reflect light. Melanin production generally increases during the first year of baby's life, leading to a deepening of eye color. The color is often stable by about 6 months of age. However several factors can affect eye color, including use of certain medications and environmental factors. Some people experience changes in eye color over the course of their lives. People can have eyes of two colors. Even the genetics of eye color inheritance isn't as cut-and-dried as was once thought, as blue-eyed parents have been known (rarely) to have a brown-eyed child!

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