Review the pedigree shown in Figure 17.7 and choose the most accurate statement about the inheritance of an X-linked recessive mutation.

Question

Quizplus · Accepted Answer

In X-linked recessive inheritance, males are more often affected than females because they only receive one X chromosome, and if that X chromosome has the mutant allele, they will express the phenotype. Females, on the other hand, have two X chromosomes and would need to inherit two copies of the mutant allele to express the phenotype. Therefore, the most accurate statement about the inheritance of an X-linked recessive mutation is that for rare X-linked traits, most of the affected individuals are males.

Review the Pedigree Shown in Figure 17