Exam 4 Flashcards
Evolution?
Change in alleles frequencies within a population
Gene pool?
The total collection of genes in a population at any one time
What causes evolution?
Genetic Drift (small populations and non random mating), Mutation, Gene flow (Migration), Natural Selection
What is genetic drift?
change in the frequency of an existing gene variant (allele) in a population due to random sampling of organisms. Bunny example.
What can reduce genetic variability within a population?
natural disasters, human activity
What is natural selection?
process by which organisms with certain heritable traits tend to survive and produce more offspring than individuals with other characteristics
What conditions produce natural selection?
variation of traits, heritability, differential reproductive success
Do individuals evolve or populations?
Populations do
