Question

1). The genotypes have an associated fitness values which we described in class as (1 1 1-s) for directional selection, (1 1-s 1) for disruptive and so on. In each of the examples below, write out the expected fitness values for AA,Aa, aa. Note that determining whether fitness for the heterozygote Aa is dominant or not is part of the question. All examples assume no other agent of evolution unless specified or required.

Example: AA Aa aa

  Answer: 1 1-s 1

a) "A" is favored by meiotic drive, and meiotic drive is the only agent of evolution.

AA Aa aa

_____ _____    _____

b) "A" is favored by meiotic drive and directional selection prevents "A" from going to 100%.

  AA Aa aa

_____ _____ _____

c) "A" and "a" experiencing changes in frequency due to drift as the only agent of evolution.

   AA Aa aa

_____ _____ _____

d) "A" is the sickle cell and "a" is the wild type(non-sickle) allele in an area with no malaria.

   AA Aa aa

_____ _____ _____