The following questions refer to the pedigree chart in Figure 14.2 for a family, some of whose members exhibit the dominant trait, wooly hair. Affected individuals are indicated by an open square or circle.

Figure 14.2
-What is the likelihood that the progeny of IV-3 and IV-4 will have wooly hair?

Question

The following questions refer to the pedigree chart in Figure 14.2 for a family, some of whose members exhibit the dominant trait, wooly hair. Affected individuals are indicated by an open square or circle.
  
Figure 14.2
-What is the likelihood that the progeny of IV-3 and IV-4 will have wooly hair?

Quizplus · Accepted Answer

IV-3 and IV-4 are both affected (shown by their open circles), which means they both carry at least one dominant allele for wooly hair. Therefore, there is a 50% chance that any progeny they have will inherit the dominant allele and exhibit the trait of wooly hair.

The Following Questions Refer to the Pedigree Chart in Figure