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Position:Home>Genealogy> Genes is it possible to have green eyes when parents have brown?


Question:Ive got green eyes, both my parents have got brown eyes, and my other two brothers have got brown eyes as well. As well as that, i have fair hair and my brothers have dark hair and as do my parents - So how does this genetically work?


Best Answer - Chosen by Asker: Ive got green eyes, both my parents have got brown eyes, and my other two brothers have got brown eyes as well. As well as that, i have fair hair and my brothers have dark hair and as do my parents - So how does this genetically work?

All genes come in pairs and this means that both your parents have a recessive gene as part of their genes, so they have one dominant gene (brown eyes, dark hair) and one recessive gene (green eyes, light hair) which determine their hair and eye colour.

If a dominant gene is paired with a recessive one, the dominant always wins.

When you are conceived, only one of the genes is taken from each parent to make the baby, so lets call recessive genes R and dominant ones D. your parents are either M(male), F(female)as follows

RM-DM (pairing for father) and RF-DF (pairing for mother) and when having children there is a 25% chance of each of the following pairings in their children as at random one gene (either R or D) will be taken from each parent:

DM-DF = Dominant brown eyes, dark hair
DM-RF = Dominant brown eyes, dark hair
RM-DF = Dominant brown eyes, dark hair
RM-RF = Recessive gene, green eyes, light hair.

So it is genetically possible, just a lower probability of it happening.

Hope that helped.

Unsure 1 of my sons is blonde with blue eyes my daughter is dark with green eyes and my other son is blonde with eyes like coal and they all have same father i have brown eyes so does there dad.

mother in law has blue eyes my mum has hazel eyes and dad has grey eyes.

its just the way things are

Yes it is. Both my parents have brown eyes and I have green. My husbands eyes are brown yet 2 of our sons have blue eyes.
http://museum.thetech.org/ugenetics/eyeC...

Some genetics, like eye and hair colour can skip a generation or too, you might find one of your grandparents or great-grandparents has/had green eyes and fair hair.

Green eyes and fair hair are recessive alleles, which means that to show the characteristic you have to inherit the allele from both parents. Both your parents would have carried the allele for green eyes and for fair hair. An allele is a form of a gene. Your parents would have been heterozygous brown-eyed, meaning they carried the brown-eye dominant allele and another. Similarly they would have been heterozygous dark-haired.

This is a simplified picture. Eye and hair colour are both determined by more than one gene. There are more eye colours than the text book brown and blue and more hair colours than the text book black and red.

From your grandparents, on both sides i would think.

Ummm, some of the answers above give a much, much to simplistic view in regards to dominant/recessive. This doesn't totally apply to eye color.

The answer to your question is YES.

Eye color is determined by the concentration of eumelanin in the stroma and the epithelium as well as the cell density of the stroma.

There is a genetic basis to eye color but it isn't a simple dominant/recessive as in humans, there are three major genes that impact eye color - they are commonly known as EYCL1, EYCL2 and EYCL3. The combination of these help establish base colors of green, blue and brown. But there are many other genes that have minor effects (this results in a lot of shades) and there are other non-gene based mechanisms that influence it as well.

One recently discovered by NIH was a single nucleotide polymorphism that occurs near the OCA2 gene.

So eye color is not the result of a single gene or even JUST genes. It is a very complex process.

But if you want to just consider eumelanin production as the result of genes, then parents with brown eyes (lots of eumelanin production) can have children of any eye color - but parents with blue eyes (low eumelanin production) would be LESS LIKELY, but not impossible, to produce offspring with brown eyes. But this is still using an artificially simplistic basis.

This is a genetics question. You posted it in the genealogy forum. They are not the same thing, and are not related. Genetics is a SCIENCE that requires years of specialized college education to work in the field. Genealogy is a HISTORICAL body of research of your ancestors, and is something anyone can do without a college education if you are willing to work at it and find your ancestors.

Basically, you are asking historians a science question. Does not work that way. In school, one does not go to their history teacher to explain about protons and neutrons. You go to your science teacher for that. Same thing here.

yes it is my whole family on both sides since the begginning of time have had hazel eyes but i got blue.

Yes, it is possible. My research on this, however, shows that brown is dominate over blue and green.

My husband has green eyes and I have brown eyes. Our son ended up with brown eyes.

interesting question , my parents have blue eyes, my 4 brothers and 2 elder sisters are brown eyed and im green eyes , whats more i like them

Genes from your grandparents and even their parents can run on for generations and influence the colouring of a child's eyes, skin and hair.
Surprisingly, a lot of brown eyed couples have a blue eyed child.

My friend is actually a science lecturer in Nottingham in Biology, Chemistry and Physics (so I guess he knows his stuff :) ) and he confirmed that it's a true theory.