Assignments for Today

• Read Walter Fitch's article on types of homology (available on HuskyCT or here)

Assignments for Wednesday

• Explore the population genetic simulations at http://www.radford.edu/~rsheehy/Gen_flash/popgen/.
  • Using the same fitness and frequency for the A1 and A2 allele, explore the impact of population size on drift?
  • For a larger population size (1000) explore settings that reflect balancing selection.. (w11:.9; w12:1, w22=.95)
  • What happpens, if you decrease the population size?
  • Using a small initial frequency of allele 1 (e.g. 0.01 with a population of 50) and a large fitness advantage for this allele, perform simulations for 20 populations.
    What does this suggest for the effectiveness of natural selection? Does natural selection acting on a single advantageous allele work better in a large population?

• What, if any, is the difference between a mutation and a substitution? (More than on answer is possible.)

 

Discuss globin gene evolution.
Discuss orthologs, in and out-paralogs.

PPT Slides for today