Unpacking the Problem 70A man’s grandfather has galactosemia, a rare autosomalrecessive disease caused by the inability to process galactose,leading to muscle, nerve, and kidney malfunction. The manmarried a woman whose sister had galactosemia. The womanis now pregnant with their first child.a. Draw the pedigree as described.b. What is the probability that this child will havegalactosemia?c. If the first child does have galactosemia, what is theprobability that a second child will have it?

Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN:9781305251052
Author:Michael Cummings
Publisher:Michael Cummings
Chapter7: Development And Sex Determination
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Problem 19QP: Equalizing the Expression of X Chromosome Genes in Males and Females Individuals with an XXY...
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Unpacking the Problem 70
A man’s grandfather has galactosemia, a rare autosomal
recessive disease caused by the inability to process galactose,
leading to muscle, nerve, and kidney malfunction. The man
married a woman whose sister had galactosemia. The woman
is now pregnant with their first child.
a. Draw the pedigree as described.
b. What is the probability that this child will have
galactosemia?
c. If the first child does have galactosemia, what is the
probability that a second child will have it?

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