BIOL 336 Section 202
Cassandra Chan 60463080
January 18 , 2013
1. No, because the population genetics definition of evolution is the change in allele frequencies
observed in a population over generations.An individual alone cannot undergo “evolution”
under this definition.
2. “The Hardy-Weinberg theorem is a null model of evolution.”
This phrase means that the H-W theorem is a model that predicts what expected allele
frequencies should be when a population is not undergoing evolution (i.e. no evolutionary
mechanisms are occuring).
Assumption of the H-W model Evolutionary mechanism
Population infinitely large Drift
All genotypes equally likely to survive and Selection
No alleles enter or leave population via migration Gene flow
No mutations Mutation
4. Evolution can occur if one or more of these assumptions are not met.
5. “Random mating” is mating between individuals in a population with respect to the alleles at
their genetic locus of interest.