The pedigree below shows the segregation of an autosomal dominant trait. If IV-1 marries IV-5, what is the probability that their first child will be affected? Assume that the homozygous mutant genotype is viable and has the same phenotype as the heterozygote.
A) 1/4
B) 1/2
C) 3/4
D) 3/8
E) 1/8

Question

The pedigree below shows the segregation of an autosomal dominant trait. If IV-1 marries IV-5, what is the probability that their first child will be affected? Assume that the homozygous mutant genotype is viable and has the same phenotype as the heterozygote. 
A) 1/4 
B) 1/2 
C) 3/4 
D) 3/8 
E) 1/8

Quizplus · Accepted Answer

The Answer of The pedigree below shows the segregation of an autosomal dominant trait. If IV-1 marries IV-5, what is the probability that their first child will be affected? Assume that the homozygous mutant genotype is viable and has the same phenotype as the heterozygote. 
A) 1/4 
B) 1/2 
C) 3/4 
D) 3/8 
E) 1/8

The Pedigree Below Shows the Segregation of an Autosomal Dominant