Question

Read the statement. A natural disaster reduces the size of a population. The allele frequencies in the population may change after the disaster. What type of population does this have the strongest evolutionary effect on? A. It affects all populations to the same extent. B. A small-sized population. C. A large-sized population. D. A population with great genetic diversity.

Answer 1

A natural disaster would have more severe effects upon populations which are not very high in terms of individuals, in other words, in a small-sized population, because the allele frequency would be highly injured, due to the decay of great part of the population, lefting a reducted genetic variation among the surviving individuals. The correct answer then is the second one: B. A small-sized population.