Genetic Drift and Gene Flow (VCE SSCE Biology): Flashcards
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Practise the cards
10 cards from this deck
Genetic drift
Genetic drift
Random event that dramatically alters a population's gene pool
Bottleneck effect
Bottleneck effect
Genetic diversity reduction when most of population is removed
Founder effect
Founder effect
Diversity reduction from small unrepresentative sample
Gene flow
Gene flow
Flow of alleles between populations via migration/interbreeding
Immigration effect on genetic diversity
Immigration effect on genetic diversity
Increases diversity by adding new alleles to gene pool
Emigration effect on genetic diversity
Emigration effect on genetic diversity
Decreases diversity by removing alleles from gene pool
Inbreeding
Inbreeding
Sexual reproduction between two related individuals
Adaptive potential
Adaptive potential
Ability to adjust to new environmental selection pressures
Small populations & genetic drift
Small populations & genetic drift
More affected; each individual is larger % of gene pool
Genetic drift vs natural selection
Genetic drift vs natural selection
Drift is random chance; selection favours advantageous traits