Question

Sickle cell anemia is a genetic disease caused by an autosomal
recessive gene. If each parent carries one sickle cell allele, what
are the chances that their child will have sickle cell anemia?
Select one:
•no chance
•one in four
•three in four
•two in four

Answer 1

Answer: one in four

Explanation:

The child will be a carrier three out of four, but will have sickle cell one out of four.

Make a punnet square

S s

S. SS. Ss

s. Ss. ss