Match the event with the most appropriate term.
-two beta globin chain alleles (the Hb A normal allele and the HB S sickle cell anemia allele) that both circulate at high frequencies in subtropical regions where malaria is a threat
A)directional selection
B)sexual dimorphism
C)sympatric speciation
D)balanced polymorphism
E)coevolution
F)allopatric speciation
G)key innovation
H)adaptive radiation

Question

Quizplus · Accepted Answer

The prevalence of the Hb A and Hb S alleles in subtropical regions where malaria is prevalent suggests balanced polymorphism, where both alleles are maintained at high frequencies due to their selective advantages in different conditions. The Hb A allele protects against malaria while the Hb S allele provides some protection against severe forms of malaria.

Match the Event with the Most Appropriate Term