You are a genetic counselor who is helping a woman who is concerned she will have a child with a rare X-linked disease called Duchenne muscular dystrophy (DMD). This woman is concerned because her cousin (her mother’s only sister’s son) has the disease. The woman has no brothers or sisters.
Use the pedigree of the family below to answer the following questions.
a. Indicate the most likely genotype for each family member in the pedigree, where D = the wildtype DMD allele and d = the mutant DMD allele. (3 points)
b. Calculate the probability that the young woman’s first child will have DMD. (3 points)
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