Question

what will happen to the frequency of the recessive allele for the hbs gene when there is an outbreak of malaria?
o the frequency will increase
o the frequency will decrease
o the frequency will remain constant
o it is impossible to predict how the allele frequency will change
o the frequency will be cut in half with each generation.

Explanation:

The HbS gene is related to sickle - cell anemia. Carriers of the HbS allele (heterozygotes) have some resistance to malaria. During a malaria outbreak, individuals with the HbS allele have a survival advantage, so the frequency of the recessive HbS allele will increase in the population due to natural selection.

Answer:

The frequency will increase.