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Problem: A man has extra digits (six fingers on each hand and six toes on each foot). His wife and their daughter have a normal number of digits. Having extra digits is a dominant trait. The couple's second child has extra digits. What is the probability that their next (third) child will have extra digits?A. 1/16B. 1/8C. 3/4D. 9/16E. 1/2

FREE Expert Solution

Polydactyly is a common inherited malformation leading to having extra digits in hands and feet. Its phenotype is highly variable, in that it may be severe or mild, symmetrical or assymetrical, complete or incomplete. Although this trait has been well understood phenotypically, the nature of the genotypes remains to be cleared for a number of types. In this problem, it would be assumed that only one gene is involved in the condition.

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Problem Details

A man has extra digits (six fingers on each hand and six toes on each foot). His wife and their daughter have a normal number of digits. Having extra digits is a dominant trait. The couple's second child has extra digits. What is the probability that their next (third) child will have extra digits?

A. 1/16

B. 1/8

C. 3/4

D. 9/16

E. 1/2

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Genetic Counseling concept. You can view video lessons to learn Genetic Counseling. Or if you need more Genetic Counseling practice, you can also practice Genetic Counseling practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Partridge's class at TEXAS.