17.1 - 17.2 Flashcards
Gene pool
Consists of all the genes including all the different alleles for each gene
Allele frequency
Number of times allele shows up in a gene pool
Single gene trait
Presence or absence of dark bands
Polygenic traits
2 or more genes controlling
Directional selection
Individuals at end of curve have higher fitness than in middle or other end
Stabilizing selection
Center curve higher fitness than other sides
Disruptive selection
Outer fitness higher fitness than ends
Genetic drift
Random change in allele frequency
Bottleneck effect
Change in all frequency following a dramatic reduction in size of pop
Founder effect
Allele frequency changes based on migration of small subgroup
Genetic equilibrium
Allele frequency doesn’t change
Hardy-Weinberg principle
Allele frequencies remain constant unless factors make it change
Sexual selection
Genes for traits selected aren’t equilibrium