If a Disease is Autosomal Recessive Like Sickle-Cell Anemia, It

Question

If a disease is autosomal recessive like sickle-cell anemia, it is caused by:
A) failure to inherit one of the sex chromosomes.
B) failure to inherit one of the autosomes.
C) inheritance of an extra autosome.
D) a gene on a chromosome other than X or Y.
E) a gene on a chromosome other than an autosome.

Accepted Answer

Autosomal recessive diseases like sickle-cell anemia are caused by mutations in genes on autosomes (chromosomes other than X or Y). Since autosomes are not sex chromosomes, the correct answer is that the disease is caused by a gene on a chromosome other than X or Y.