Biology 17.1 & 17.2 vocab

Created by morgshorse 

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13 terms

Gene pool

consists of all genes that are present in a population

Allele Frequency

number of times an allele occurs in a gene pool compared to total number of elleles in the pool for that gene

Single Gene Trait

trait controlled by one gene

polygenic trait

traits controlled by two or more genes

stabilizing selection

form of natural selection where individuals in middle of curve have higher fitness than individuals at either end of the curve

directional selection

form of natural selection where individuals at one end of fitness curve have higher fitness than individuals in the middle or other end of the curve

disruptive selection

natural selection where individuals at upper and lower ends of the curve have higher fitness than individuals in the middle

genectic drift

random change in allele frequency

bottleneck effect

change in allele frequency following a dramatic reduction of population size

founder effect

allele frequencies change because of migration of a small sub group of a population

genectic equilibrium

allele frequencies in gene pools aren't changing

Hardy-Weinberg Principle

allele frequencies in a population should remain constant unless one or more factors cause the frequencies to change

sexual selection

select mates by size, strength, or coloration

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