Ask Question
19 March, 11:01

Fossil records show that the size of black bears in europe increased during each glacial period and decreased during the interglacial periods. identify the type of selection that occurred during each period and discuss how the type of selection supports the claim that a single environmental factor can yield a variety of phenotypic responses from different genotypes within a population.

+2
Answers (1)
  1. 19 March, 11:02
    0
    The answer is directional selection

    It is the mode of natural selection in which a single phenotype is favored, causing the allele frequency to continuously shift in one direction. The advantageous allele increases in frequency independently of its dominance relative to other alleles; that is even if the advantageous allele is recessive, it will eventually become fixed, changes the average value of a trait. Occurs most often under environmental changes and when populations migrate to new areas with different environmental pressures.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Fossil records show that the size of black bears in europe increased during each glacial period and decreased during the interglacial ...” in 📗 Biology if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers