A U.S. state (abbreviation of United States state) is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the
exists and is an alternate of . The sequence of DNA bases (thymine, cytosine, adenine, and guanine) code for specific traits. The number of and which alleles you have (coded for my the DNA=genes) will determine traits such as eye color.
What is surprising to me is that eye color doesn't change more often. Eye color is determined by lots of different genes but it all boils down to how much pigment you have in the front part of your iris at any one time. Lots of pigment means brown eyes, a little bit, blue eyes. Other colors come from intermediate amounts of pigment. The genes involved in eye color determine how much pigment gets made, how quickly it is degraded and where in your iris to put it. In other words, eye color is an ongoing process that is not necessarily set in stone. So all that has to happen to change eye color is to change the final amount of pigment in your eye.