Question

Sickle cell disease is caused by a:

A. change in one allele.

B. change in the size of a chromosome.

C. change in two proteins.

D. change in the number of chromosomes in a cell.

Answer 1

I think the correct answer from the choices listed above is option A. Sickle cell disease is caused by a change in allele. It is a disorder of the blood caused by an inherited abnormal hemoglobin. Hope this answers the question. Have a nice day.