Often caucasian newborns have blue eyes, which change to green, hazel, light brown or dark brown, as they grow older. Brown eyes are the predominent color worldwide and only 8% of the population have blue. It is thought that exposure to light after birth triggers the production of melanin in the iris of the eye. Color is an inherited trait influenced by more than one gene. The model learned in school about brown-eye color being dominant over blue is an over-simplification. There is no single gene for eye color. There are two major genes and other minor ones that account for the variations. Eye color is demanding, as all four genes must determine the same color for the eye color to be pure; otherwise a mixed color such as hazel will result. Eye color typically stabilizes by around 6 months of age and by three years, the eyes produce and store enough melanin to have their "final," natural shade. (Wikpedia, 2007)So, mommy has blue-grey eyes and daddy has brown eyes...Two and half months into her life and Fiona's still pretty blue but we'll have to get back to you in September. Her hair continues to lighten with fine, blonde new growth sprouting up each day.
No comments:
Post a Comment