Sunday, January 16, 2011

Before I forget_4 H-W , Gene flow and Genetic drift

Conditions of Hardy Weinberg equilibrium
- Mutation
- Gene Flow
- Genetic Drift
- Natural Selection

Gene Flow
Exchange of genes between populations of the same species which will result in mixing of genes and change of gene frequencies in both populations.
Acts against speciation.
Gene flow is the mechanism that maintains species
Speciation is the origin of new species

Genetic Drift
Random change in gene frequencies within population
Seen in small sized populations

Results of Genetic Drift
Tends to reduce genetic variability within a population, in extreme cases all the members of the population may become identical
Important in conservation biology
Because animals are conserved in zoos as ex situ conservation because their population in the natural environment is low.

No comments:

Post a Comment