BIOL 409 Study Guide - Quiz Guide: Chromosome, Genetic Drift, Adaptation
Document Summary
Biol 409: unit 2 practice questions: briefly explain what is meant by the modern synthesis in biology. With close relatives), random mixing of gametes does not occur, and genotype frequencies change: briefly explain what is meant by the modern synthesis in biology. *variation-generating forces: compare and contrast natural selection with genetic drift as mechanisms of evolution. Genetic drift: random process, occur due to environment challenges, directional, generation of adaptive trait, ends up with survival of the fittest, operate on any allele. Increase genetic variation: doesn"t occur due to environment challenges, non-directional, non-adaptive evolution, operate on neutral allele, loss of genetic variation. Important allele may disappear: changes allele frequencies over time, compare the different types of mutations discussed in class. Gene duplication duplication of a short stretch of dna creating an extra copy of a gene. Flipping of a chromosome segment, changing gene order.
