MY husband has brown eyes, i have dark green eyes, my son has brown eyes but my daughter has light blue eyes, why is this?

asked 14 Jul '10, 09:19

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Donna
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edited 14 Jul '10, 18:51

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Chris W. Rea
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3

how old is she?

(14 Jul '10, 11:01) Fisherman

Eye color is hereditary. The wikipedia article says it's more complicated than dominant and recessive, but what my biology-teaching brother told me is that if you carry the gene for blue eyes (and have brown eyes yourself), you can pass on the blue gene (trying hard not to make a pun here) to your child. If the other parent also carries the blue gene, then your child could have blue eyes.

Here's the wikipedia article.

link

answered 15 Jul '10, 21:41

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Sunday
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The most important sentence from that great wikipedia article is this: "The genetics of eye color are so complex that almost any parent-child combination of eye colors can occur."

(15 Jul '10, 22:32) lgritz
1

+1 Sunday, for the wikipedia article. It should be required reading for every person who's ever looked at my brown-eyed partner and myself (also brown-eyed) and then my blue-eyed daughter and stated emphatically that "It's impossible for 2 brown-eyed parents to have a blue-eyed child". One more person insults me that way and I'm gonna kick them in the shin!

(17 Jul '10, 03:11) Neen

The answers to this question may help: When does an infant's eye color become permanent?

link

answered 14 Jul '10, 15:49

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Kate
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Babies have a tendency to start with blue eyes that will change color later. So depending on the age of your little girl, that could be the answer.

However I had a situation like yours. My son has brown eyes. My husband and I have green eyes. My daughter, mom and MIL have blue eyes. My dad and FIL also have green eyes. So eventually I mentioned the aberration to my in-laws. I found out that my FIL grew up with brown eyes then one day received a really nasty concussion. He said he saw double for 3 weeks after the injury. When his vision cleared he had green eyes. Any way, we figured that my son's brown eyes came from his paternal grandfather.

link

answered 14 Jul '10, 14:31

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mkcoehoorn
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accept rate: 8%

I find this story highly dubious. How could a blow to the head change which pigment chemicals are in somebody's eyes, which is genetically determined? Maybe memories have conflated after a half century, maybe the concussion triggered closer scrutiny of his eyes that had already been changing as he got older and then relatives mis-associated that with the concussion.

(14 Jul '10, 19:20) lgritz

I don't understand it myself. But the point I was trying to get across is that sometimes you have to go farther back in your genetic history than just the parents to figure out the source of a trait in your child.

(14 Jul '10, 22:15) mkcoehoorn

I had brown eyes until late puberty, then my eye colour changed until it's now greenish gray with a small brown ring in the middle. Maybe your FIL experienced something similar and simply connected it to the concussion?

(15 Jul '10, 07:50) brandstaetter

That's possible.

(15 Jul '10, 16:13) mkcoehoorn
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Asked: 14 Jul '10, 09:19

Seen: 2,245 times

Last updated: 15 Jul '10, 21:41