In the following pedigree,the indicated trait is caused by which type of allele? Assume the trait is fully penetrant and that the trait is rare in the population,so that alleles for the trait are not carried by anyone who is not the progeny of a mating shown in the pedigree.
A) autosomal recessive
B) autosomal dominant
C) X-linked recessive
D) X-linked dominant
E) Y-linked

Question

In the following pedigree,the indicated trait is caused by which type of allele? Assume the trait is fully penetrant and that the trait is rare in the population,so that alleles for the trait are not carried by anyone who is not the progeny of a mating shown in the pedigree. 
A) autosomal recessive 
B) autosomal dominant 
C) X-linked recessive 
D) X-linked dominant 
E) Y-linked

Quizplus · Accepted Answer

The trait is being passed down from affected individuals to their offspring, indicating that it is a dominant trait. Since the pedigree shows that both males and females are affected, it must be an autosomal dominant trait.

In the Following Pedigree,the Indicated Trait Is Caused by Which