Autosomal dominant inheritance?

_____25. Autosomal dominant inheritance is shown by all but which of the following?


a) Marfan syndrome


b) color blindness


c) brachydactyly


d) hypercholesterolemia


e) achondroplastic dwarfism

Autosomal dominant inheritance?
The answer is b. Color blindness is a sex-linked recessive trait. The gene is on the X-chromosome, not on one of the autosomes.