In individuals affected by cystic fibrosis, salt crystals may appear after perspiration dries up. In addition, the disease causes respiratory disorders which can be both debilitating and lethal. It occurs in individuals homozygous for the recessive gene. Two normal parents had a daughter with the symptoms of this disease, and a normal son who marries a normal woman with an afflicted A test (salt concentration in perspiration of heterozygotes is higher than normal) disclosed that both are indeed carriers of the gene. If the first child born to the mating in (b) was defective, what is the probability that the 2nd child would also be defective?
In individuals affected by cystic fibrosis, salt crystals may appear after perspiration dries up. In addition, the disease causes respiratory disorders which can be both debilitating and lethal. It occurs in individuals homozygous for the recessive gene. Two normal parents had a daughter with the symptoms of this disease, and a normal son who marries a normal woman with an afflicted A test (salt concentration in perspiration of heterozygotes is higher than normal) disclosed that both are indeed carriers of the gene. If the first child born to the mating in (b) was defective, what is the probability that the 2nd child would also be defective?
Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN:9781305251052
Author:Michael Cummings
Publisher:Michael Cummings
Chapter12: Genes And Cancer
Section: Chapter Questions
Problem 2CS: Mike was referred for genetic counseling because he was concerned about his extensive family history...
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In individuals affected by cystic fibrosis, salt crystals may appear after
perspiration dries up. In addition, the disease causes respiratory disorders
which can be both debilitating and lethal. It occurs in individuals homozygous
for the recessive gene. Two normal parents had a daughter with the
symptoms of this disease, and a normal son who marries a normal woman
with an afflicted A test (salt concentration in perspiration of heterozygotes is
higher than normal) disclosed that both are indeed carriers of the gene. If the
first child born to the mating in (b) was defective, what is the probability that
the 2nd child would also be defective?
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