Question
Asked Nov 11, 2019
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Polydactyly (having more than five digits) results from the presence of a dominant allele. A
man has six fingers and each hand and six toes on each foot. His wife and their daughter
have the normal number of digits. What percentage of this couple's children would be
expected to have extra digits?
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Polydactyly (having more than five digits) results from the presence of a dominant allele. A man has six fingers and each hand and six toes on each foot. His wife and their daughter have the normal number of digits. What percentage of this couple's children would be expected to have extra digits?

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Expert Answer

Step 1

Polydactyly is the condition of having extra fingers and toes in humans. It is caused by heterozygosity for loss-of-function alleles for one particular gene. In the given question, they have mentioned that the daughter is having normal number of digits. This is possible only when the father is having heterozygous dominant allele for polydactyly condition.

Step 2

Let us consider the dominant allele for polydactyly be Pp and the mother’s allele who is having normal digits be pp. So, the...

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Р р Рp P Pp Pp р pp

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