Factors That Chabge Allele Frequency

Question 1

Natural selection

Answer 1

Envirpbment increases the frequency of alleles that provide a reproductive advantage to individuals. Leads to evolution of adaptations. Different selection pressures can affect the relative fitness of phenotypes in a population

Question 2

Sexual selection

Answer 2

Favours the selection of any trait that influences the mating success of the individual, eg peacock feathers. Often traits that help in sexual selection come at a cost to the organism, eg difficulty escaping predators

Question 3

Artificial selection

Answer 3

Intentional breeding for certain traits, or combination of traits (done by humans) example domesticated dog breeds, or corn