Bio 102// EXAM 1 – Flashcards
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Hybrids do NOT survive
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Hybrid inviability
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Hybrid offspring between two species are sterile and therefore cannot mate
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Hybrid sterility/infertility
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is a change in the gene pool of a population due to chance. If a new generation draws its alleles at RANDOM from the previous generation, then the larger population, the better the new generation will represent the gene pool of the previous generation.
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Genetic drift
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When a population gains or loses alleles when fertile individuals move into or out of the population or when gametes are transferred between populations. People with different genes find their way into different populations and spread their genes (example immigration)
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Genetic flow
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occurs when there is some sort of disaster that reduces the population; the surviving population is has less genetic variation than the original population
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Bottleneck effect
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occurs when a new population is started by a few individuals from another larger population; this results in reduced genetic variation in the new population
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The founder effect
