Author Question: ________ is demonstrated by the example that the heterozygote HbS HbA, one sickle-cell allele and ... (Read 261 times)

sdfghj · **on:** Aug 11, 2018

________ is demonstrated by the example that the heterozygote HbS HbA, one sickle-cell allele and one normal one, was maintained in some populations as the fittest phenotype for a malarial environment.

A. Mutation
B. Genetic drift
C. Phenotypical adaptation
D. Recombination
E. Balanced polymorphism

Question 2

________ describes the process that allows the selection of certain traits of one sex because of advantages they confer in winning mates.

A. Mitosis
B. Genotype
C. Directional selection
D. Sexual selection
E. Independent assortment