Anyone see this today on MSN?
Scientists apparently say everyone with blue eyes has the same ancestor
I have blue eyes.
So who all here am I related to! :eek:
me, sort of. I have kind of grayish-blue eyes.
Hiya, cousin!
Don’t they already claim that everybody is related after so many generation’s back?
Mine change color. So sometimes we’re related, sometimes not. Like an Alabama prom date.
I think you’re right, Harmonious.
Anyway, I’m blue-eyed, and want to know if I have children with a brown-eyed woman, what kind of eyes should we expect? (I mean, are there percentages, odds, whatever…?)
Gray-blue here.
And my husband, too. Oh, dear… :smack:
That’s not good.
Anyway, I don’t know the percentages of blue-eyed babies among dark and light-eyed people, but I DO know two blue-eyed people can only make blue-eyed children. No matter how many they have, they’ll always have blue eyes.
guizot, to answer your question, I had to remember back to what I learned about it in biology.
http://www.accessexcellence.org/RC/VL/GG/recessive.html
Everyone has two chromosomes and the trait for blue eyes–let’s call that a little b. So b, then… The trait for brown eyes is usually depicted as a large B.
There are three combinations a person could have. They’d either have a BB, Bb, or bb. Only a combo of bb chromosomes would make blue eyes.
If you have blue eyes, you have bb. So you can ONLY give a small b to a child. Your SO, however, if she has brown eyes, might have be BB or Bb. Bb means she CARRIES the trait for blue eyes, but she wouldn’t have blue eyes since that one large B is dominant. So if you had four kids (and she is Bb), the chances that one of them (or two of them) would have blue eyes are fairly good.
However if she carries the BB genes, there is no way any of your kids would have blue eyes. This is because they’d get a b from you, but a B from her…making their chromes Bb. So they’d carry the trait for blue eyes, but they’d have brown.
There’s no way to tell (as far as I know) if she has BB or Bb.
Well, it depends on whether or not your brown-eyed girl has two brown genes or just one. If she has two brown-eye genes, all your kids will be brown eyed. If she has one brown-eye gene and one not-brown-eye gene (it’s not really a “blue” gene, it’s a not-brown gene), then statistically each offspring has a 25% chance of blue/green/yellow or hazel eyes* and 75% chance of brown eyes. Of course, every kid gets the same odds, so it’s not unusual to have all brown eyed kids.
*Green, hazel and yellow irises are caused by lipid droplets in an otherwise “not-blue” eye. So if your sister has green eyes you can tease her that she’s got fat eyeballs.
My dad has blue eyes, so I’m related to all of you.
So I’ve found five of my long lost cousin’s so far? : p Nice.
Sure there is. Look at the kids eyes if they are blue you will know she must be Bb. Of course, that won’t help if you want to know before the kid is born…
I’m confused. Wouldn’t Bb manifest as brown?
He means if the kids - any of them - have blue eyes, *she * (the brown-eyed mother) must be a Bb, or carrying a hidden recessive gene. The kid, of course, will be bb.
Yup. There is a most recent common ancestor (MRCA) of all surviving humans. And that’s just the most recent common ancestor - there may be several common ancestors further back in time (e.g. the one with blue eyes).
The MRCA is usually thought to have lived in Paleolithic times, but some estimates put them in historical times:
Here’s a really cool site that you can put your eye colour, your parents’, your partner’s, and their parents’ and it will figure out the probability of the eye colour of your children.
http://museum.thetech.org/ugenetics/eyeCalc/eyecalculator.html
Hey relatives!
me too mine are greenish but way more blue than green
I’m blue, but my husband has fat old green eyes. Both kids are blue.