Multiple Choice
In humans,the sickle-cell trait is caused by a single defective allele,but sickle-cell disease only occurs in individuals that are homozygous for the sickle-cell allele.A man and woman each carry the trait,but do not have sickle-cell disease.What is the probability that their first two children will both have sickle-cell disease?
A) 1/16
B) 1/8
C) 1/4
D) 3/8
E) 1/2
Correct Answer:
Verified
Correct Answer:
Verified
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