Indeed. Blue eyes in mammals, other than humans, is actualy quite rare if I recall correctly.ash-brewster said:defect is the wrong word really, its a genetic mutation, a accident if you will.TheDist said:Realisticaly it isn't, an argument could be made in terms of sexual selection that it could be an advantage or disadvantage, or a non factor. All on how you wanna define it, that is where the arguments come in evolution, the fact evolution happens isn't, it is all the little why's that are.David Huff said:How is having blue eyes a genetic defect
As I say, allelic frequency in a population over time.
The thing is the change doesn't need to be an advantage or disadvantage, there are many that do basicaly nothing.
http://www.telegraph.co.uk/science/science-news/3323607/Blue-eyes-result-of-ancient-genetic-mutation.html
Mutation is a word that people confuse a lot too, often drives me mad when people hear mutation then think of say x-men type stuff, or that it'd be something "bad".
I love the subject of evolution.