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mestny [16]
3 years ago
14

One type of colorblindness is a recessive, sex-linked trait that is carried on the X chromosome. If a colorblind woman and a man

who is not colorblind had children, what chance would there be that their son would be colorblind?
Biology
1 answer:
lisabon 2012 [21]3 years ago
8 0
For this scenario, I'll use V for vision to describe the alleles. The cross would be (Xv Xv) x (XV y) giving a 50% of each gender. The way you asked the question is asking for the probability of the child being colorblind given it is a boy, and the answer is 100% because in each case a son would inherit the y from the father, and then a recessive Xv colorblind allele from the mom. In you want the probability of the child being colorblind and a boy out of the total possibilities it is 50% because all the sons will be colorblind.
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