Homework Help: biology

Posted by Andrew on Thursday, March 31, 2011 at 1:37pm.

A man with normal color vision marries a woman who is colorblind. What percentage of their sons would be colorblind, what percentage of their daughters would be colorblind, what percentage of their daughters would be carriers of the colorblind gene?

biology - bobpursley, Thursday, March 31, 2011 at 2:02pm
to be color blind, all X genes must have the trait. A male has only one X gene, females two X.

So the mom is XcXc, and she passes one of these Xc to each daughter and son. So the sons will be colorblind...they got it from mom. The daughers will get mom's Xc, and dad's Xo, making them carriers, but not colorblind.

Man: XoY
Mom: XcXc
daughters: XcXo
sons: XcY

Answer this Question

Related Questions

biology /help - . The hemophilia gene is located 12 map units from the red-green...
please help me - The hemophilia gene is located 12 map units from the red-green...
Biology - If two people with normal vision have a daughter can she be colorblind...
biology help - color blindness is a sex linked disorder caused by recessive ...
7th grade science - A woman with normal color vision has a colorblind daughter. ...
science - A normal man and a heterozygous color blind "carrier" woman ...
life science - ok i really need help. like really bad. cant figure it out. ok ...
biology - what genotypes would I use on a punnett sqare to shoe a man(color ...
Biology - GENETICS PRACTICE PROBLEMS Worth 10 points each problem is either ...
College General Biology - A man who is a non-tongue roller (t) marries a woman ...

For Further Reading

First Name:
School Subject:
Answer: