Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
How do two green eyed people have brown eyed children?
The oversimplified explanations of eye colour I've heard have always described the brown eye 'gene' as being dominant...clearly not in my family!
If it helps the only person with brown eyes in my family is a great uncle on my dad's side.
I do know a fair amount about biology (just not complex genetics) so don't be afraid to make it complex and point me towards papers in PRJs and so on.
As I said, I do know a bit about biology so I understand Mendelian inheritance...clearly that's not the issue in this case.
I'm also fairly confident that my parents are who I think they are, unless my mother was carrying on an affair with the same milkman in two different parts of the country.
Thanks Helene_thygesen and steve-bob
18 Answers
- helene_thygesenLv 41 decade agoFavorite Answer
Presumably, your parents lack two different parts of the pigment pathway. Suppose the two genes A and B are both needed to produce the brown pigment. They are both dominant so one copy is enough. Your father could be AAbb and you mother aaBB. If that's the case, your father would be blue-eyed because he has no B-gene and you mother because she has no A-gene. All children would be AaBb and thus brown-eyed.
If your father is Aabb and/or if your mother is aaBn, they could get both blue- and brown-eyed children.
- Steve-BobLv 41 decade ago
It's completely possible genetically, and is called genetic throwback.
The model of two genes for eye colour is a very simplistic one, which is used to introduce the concept of genetic inheritence. There are however many more genes which contribute to the eye colour. It is therefore possible that both your parents have parts of the brown eye genes, but not enough to make a full brown eye, and the bits from each parent add up to a whole brown eye (see someones AAbb and aaBB explanation above).
So the main thing to remember: genetics isn't quite so simple as everyone has two genes for each characteristic.
- 1 decade ago
If you want a simple answer to this read up on the experiments done on the Sweet Pea done by a chap called Gregor Mendel. He was an amazing Monk who lived centuries before the science of genetics and is generally now regarded as the founder of this subject.
He was the one who found out that some genes for colour and hieght are dominant and devised simple rules and reasons behind it all.
Source(s): http://en.wikipedia.org/wiki/Gregor_Mendel - 1 decade ago
You Can Get your eye color from anyone in your family the only thing that u have to get from your Parents is their Blood Type It has to be one or the others if not someone was Cheating
- How do you think about the answers? You can sign in to vote the answer.
- 1 decade ago
Genes are random, both parents have the gene in them which could make anything about the child come out different from them both. Darker colors are dominant, so it's very possible that this could happen.
- 1 decade ago
Eye color is one of the few traits that do not follow the rules of Mendelian intheritance. Here's a link if you want to read up on any of it http://en.wikipedia.org/wiki/Mendelian_inheritance
- 1 decade ago
because some one in your past had brown eyes means you carry the gene for it and brown is one of the dominant colours and can reappear at any time
- 1 decade ago
genetics... same as two brown eyed people have green eyed children like myself... yet mine and my husbands parents generation and our grandfathers/grandmothers generation dnt have green eyes onliy hazel... so it goes bak quite a bit!
- AlenLv 41 decade ago
its genetics , it is always possible. its because there are genes in teh children which carry the genetic information from its grand parents or relatives.
- Anonymous1 decade ago
Oh dear, shame and scandal in the family