Why do we have different colored eyes?
Answers: It has to do something with your Genetic Profile..
Like many human characteristics, eye colour is determined at least partially by genetics. This is where your parents' characteristics are passed onto you and your siblings via your genes.
As with most genes, people have two copies of the gene controlling eye-colour (one from each parent). You only need one copy turned 'on' to make enough melanin to have brown eyes. Obviously the same applies to your parents, so a brown-eyed parent could have one or two 'on' copies, but a blue-eyed one must have two 'off' genes.
So, if your father has brown eyes, he might have both genes turned 'on', or just one. If he gives you an 'on' copy then you will have brown eyes, whatever colour eyes your mother has. The same applies to your mother. If she gives you an 'on' copy then your eyes will be brown. If you get an 'on' copy from each parent then your children's eyes will be brown too. You can still get blue-eyes from two brown-eyed parents, but only if they both have one 'on' and one 'off' copy and they both give their 'off' copy to you. If this were the case, you should have three brown-eyed siblings for every blue-eyed one (although you would need a lot a brothers and sisters to test this).
However it isn't as easy as that. There is more than one gene controlling eye colour, allowing for various degrees of pigmentation..
Eye color is determined by the amount of pigment (melonin) that are in the cells of the iris. The more pigment you have the darker your eye color will be (brown). The less you have the lighter your eye color will be (hazel and blue). There isn't anythign that causes a blue color, it is a result of less pigment. And of course genes inherited from your parents determines how much pigment you will get in your eyes (iris). every thing on one side is different then the other..
Who is we? Humans?
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