Assume that connected earlobes are a recessive trait with 73% penetrance.The parents are heterozygous and homozygous recessive for the attached earlobe gene.What is the probability that their first child will have attached earlobes?
A)50%
B)18.75%
C)25%
D)36.5%
E)73%

Question

Quizplus · Accepted Answer

The probability of the child inheriting the recessive allele from both parents is 50%. With 73% penetrance, the probability of expressing the trait is 50% * 73% = 36.5%.

Assume That Connected Earlobes Are a Recessive Trait with 73