Anyone colorblind?

[Kaleigh]

Date: 2/28/2008 4:22:17 PM
Author: Sparkster
In simple terms:

The gene for colour blindness is only found on the X chromosone....

Red indicates the colour blind gene

Women = XX she will be colour blind
Women = XX - she carries the colour blind gene but because she also carries the non colour blind gene, it ''equals'' it out and she won''t be colour blind but she is a carrier.
Men = XY - not colour blind
Men = XY - he will be colour blind. Sure, he only has one colour blind gene but he does not have the ''normal'' X gene to counteract it.

You are an XX (carrier but not colour blind) and your husband is an XY - There was a 50% chance of your daughter being colour blind.

Your daughter is an XX and no matter what, she will pass on an X to her son and because the other gene will be a Y, he will be colour blind. (XY)

I have a friend who wanted to be a commerial airline pilot but couldn''t because of his colour blindness.

Thanks Sparkster. She had a feeling that if she has a son he will be color blind. But she said, who better than her to help him cope. Just the other day her friend at College had on a cool T shirt. I think it was pink and purple and had a funny phrase on it. Everyone said that''s such a great shirt, love what it says. She knew she was missing something as there was no writing on the shirt as she could see. Today, she said it''s something she encounters every day. But she said it''s kinda cool. Everyone else sees things the same and I get to see things they can''t. Hard to explain, but I understood what she meant. Many thanks to all of you, we have the answers we were seeking. Ashley says thank you!! She''s knee deep in exams, so this was very helpful.

 

[strmrdr]

Iv got to disagree with the 100% answer nothing is ever 100% with genetics.
Thats why you can get a blond blue eyed baby from 2 brown eyed brown haired parents.
Something that should be impossible.

 

[Sparkster]

Date: 2/28/2008 11:44:10 PM
Author: strmrdr
Iv got to disagree with the 100% answer nothing is ever 100% with genetics.
Thats why you can get a blond blue eyed baby from 2 brown eyed brown haired parents.
Something that should be impossible.

Years ago, scientests believed that brown dominated over blonde/blue. So Brown parents can carry the blue genes and still be brown. Then they both pass on their blue/blonde genes to their children, which is why their children are blue/blonde

The 'impossible' scenario you are confused with is the other way around. Blue/blonde parents should not be able to have brown children - well at least that what scientists thought years ago.

When it comes to eye colour, scientists over the past few years have actuallly discovered that it's more compilcated than recessive/dominant genes.

Colour blindness is determined by the 'sex' gene - which is completely different to eye colour determination. But that is not to say there won't be mutations.