Microevolution
by
Sam456789
Last updated 5 years ago
Discipline:
Science Subject:
Biology


Microevolution
Genetic Drift - The change in frequency of a gene variant in a variant in a population due to random sampling of organisms
Gene pool - is a set of all the genes or genetic information in a population usually of a particular species
bottleneck effect - a sharp decreased in a population due to environmental events like earthquakes or floods
Effects on Gene frequences
non - random mating: non - random mating effectsgenetic frequencies because traits are selected nonrandomly therefore the genes are more predictable
mutations - mutations effect genetic frequencies because they introduce more variety and more possible genetic combonations into the population
Genetic Drift - introduces more variety into apopulation because of random sampling
Natural selection - effects genetic frequencesbecause traits ae naturally selected by theenvironment
Gene Flow - Effects genetic frequencies because it introduces genetic variation into the population
Reproductive Isolation
Allopatric speciation - is speciation that occurs when biological populations of the same species become vicariant, or isolated from each other to an extent that prevents or interferes with genetic interchange.
Sympatric speciation - is the process through which new species evolve from a single ancestral species while inhabiting the same geographic region
Behavioral isolation - a reproductive barrier based on behavior, usually in the form of mating rituals and signals
Temporal Isolation - two species whose ranges overlap have different periods of sexual activity or breeding seasons
Geographic Isolation - The separation of two populations of the same species or breeding group by a physical barrier, such as a mountain or body of water.
Hybridization - any offspring resulting from the breeding of two genetically distinct individuals
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