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Genetics (dihybrid cross and Punnet sqares)

Genetics as it applies to evolution, molecular biology, and medical aspects.

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Genetics (dihybrid cross and Punnet sqares)

Postby vbangel114 » Wed Feb 15, 2012 3:15 am

Please help!

The question says: Predict what offspring (express the results in % males versus % female) might result between a woman who is DIHYBRID for Hemophilia and Colorblindness (both Sex linked) and man who is NORMAL for both traits.

I know that I have to set up two Punnet squares, and I also know that the karyotype for the male is X^(HC) Y. assuming H-normal and h-hemophilia, and C-normal and c-Colorblindness. However, I cannot figure out what the karyotypes of the female could be. (according to my Bio teacher there are two)
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Postby HelpPleaseThankYou » Wed Feb 29, 2012 9:41 am

Just do a dihybrid cross utilizing a Punnet Square: HC and hc. Then work in the percentages you got from the results based on the knowledge that there is a 50/50 chance of having a male or female. I know the answer, but you should try to do the work for yourself otherwise, if this comes up on an exam, you won't know what to do. If you post an answer, I'll check back and tell you if you're right and if not, I can help you figure it out.
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