CGS NS 201 Lecture Notes - Lecture 20: Logan International Airport, Disruptive Selection, Directional Selection
8 Dec 2016
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It can be inferred that in the presence and absence of malaria, as is favored because it prevents malaria from attacking and also does not allow for sickle-cell anemia to take its place. However, aa and ss cannot compete with as because ss is affected by sickle-cell anemia and. This shows that as is favored because it prevents malaria and or sickle cell anemia from affecting the host: what would happen to the frequency of heterozygous carriers of sickle-cell anemia (with an. The genotype of as would decrease because there would be no reason for as to exist without the threat of infection. The frequency of the recessive allele will be at a low frequency, and it will experience negative selection is if it is recessive. If it is dominant, it will continue to mutate consistently: describe three ways in which directional, stabilizing and disruptive selection differ. Directional selection has a single selector on one side of the bell curve.
