Question

In the Congo, 4% of newborns have sickle-cell disease, a recessive trait. In a population of 1000 individuals, how many would you expect to be homozygous dominant, heterozygous, and homozygous recessive (SS, Ss, ss)?

Answer 1

Homozygous dominant would be 480.

Heterozygous would be 480.

Homozygous recessive would be 40.

Step-by-step explanation:

In order to find how many would have the disease (homozygous recessive) you would have to multiply the population by the percentage affected (4% or .04). Then subtract 40 from 1000 and get 960. Then you divide that by 2 and get 480.