I have this problem from genetics tha...

I have this problem from genetics that I can not figure out. HELP?

Posted in the Genetics Forum

adamk

Blacksburg, VA

#1 Feb 17, 2013
Genes for color blindness and hemophilia are linked on the X-chromosome in humans with a recombination frequency of 30%. A woman whose father was a color blind hemophiliac and mother was normal with no history of color blindness and hemophilia wants to have children. The prospective father is normal with no history of either colorblindness or hemophilia in his family. what is the probability that she will have a normal child?
1.) 0.70
2.) 0.675
3.) 0.50
4.) 0.35
5.) 0.30
6.) 0.15
any help is greatly appreciated.
Gregor Mendel

Ashburn, VA

#2 Feb 19, 2013
She is a carrier for both colorblindness and hemophilia. Since husband is normal, all baby girls will be "normal" although there is a .5 chance they'll be carriers like Mom. Male offspring have a .5 chance of exhibiting both afflictions. So, for each child,.25. Now, consider your recombination data and your have your answer.

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