BIO120H1 Lecture Notes - Lecture 18: Genetic Drift, Pollination, Heterostyly

• School: UTSG
• Department: Biology
• Course: BIO120H1
• Professor: Spencer Barrett

Document Summary

Wright- the structure and level of differentiation among populations alot of it could be very important over long-term evolution, and stoccastic forces (genetic drift etc) will play an important role. Fischer: this is merely noise and not very important from an evolutionary standpoint and most evolutionary occurred in large populations by natural selection. Both are a bit right- its true speciation and adaptation requires genetic variability and a lot of that genetic variability is still within populations, so genetic drift can t really drive speciation. These small changes can have large changes on the organisms living there. Population: a group of individuals of a single species occupying a given area at the same time. Even plants- a large portion of the beginning of the plants lives is subterranean. Migration: the movement of individuals from one population to another. It s flower spear that s migrating around to other individuals and populations!