Due to various causes, including DDT poisoning, the population size of whooping cranes was reduced to about a dozen during the 1970s.The population size has since rebounded, and there are now hundreds of whooping cranes.Which feature would not be expected in the current populations of whooping cranes?
A) Very low levels of genetic variation
B) Very few heterozygous individuals
C) Differences from historical populations in terms of allele frequencies
D) Considerable genetic polymorphism
E) A bottleneck effect

Question

Quizplus · Accepted Answer

Considerable genetic polymorphism would be expected in the current populations of whooping cranes. The rebound in population size would have resulted from the survival and reproduction of individuals with diverse genetic backgrounds, contributing to genetic polymorphism. Low levels of genetic variation (A), few heterozygous individuals (B), differences in allele frequencies (C), and a bottleneck effect (E) may have been expected in the current populations due to the historical population size reduction, which would have reduced genetic diversity.

Due to Various Causes, Including DDT Poisoning, the Population Size