This hypothetical pedigree for a disease in humans illustrated inheritance that is
A) autosomal recessive.
B) autosomal dominant.
C) sex-linked dominant.
D) carried on the Y chromosome.

Question

This hypothetical pedigree for a disease in humans illustrated inheritance that is 
A) autosomal recessive. 
B) autosomal dominant. 
C) sex-linked dominant. 
D) carried on the Y chromosome.

Quizplus · Accepted Answer

This pedigree shows that the disease is present in multiple generations and affects males and females equally. This suggests an autosomal inheritance pattern. Since unaffected parents can have affected offspring, but two affected individuals can have unaffected children, the most likely inheritance pattern is autosomal recessive.

This Hypothetical Pedigree for a Disease in Humans Illustrated Inheritance