Glog from Romeo US Mar 30 2015

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by samafoste
Last updated 6 years ago


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Glog from Romeo US Mar 30 2015


DefinitionsGene Pool-stock of different genes in an interbreeding population.Genetic Drift -variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce.Bottleneck Effect-occur when a population's size is reduced for at least one generation.

genetic drift

Bottleneck Effect

Gene Pool

Mutation: When a mutation occurs an unexpected change to the gene frequency happens, now that this mutation is here spreading through mating, the original gene will show less frequent, or be replaced by the new gene.

Effecting the change in Gene Frequency in Population

Non-Random mating: makes the Gene Frequency narrow because of the desired characteristics, those will prospure.

Genetic Drift:-Random chance, through mating, can result in an inherited change (of allele frequency) within the lineage, thus we say that evolution has occurred through genetic drift.

Natural Selection:- Is the gradual process by which heritable biological traits become either more or less common in a population. This affects the gene frequency by use or disuse, so the more survival and reproduction a certain trait has it will survive

Gene Flow -transfer of alleles or genes from one population to another.-the more migration the more gene transfer and the more varity in the population and the original gene may disapear from reproduction.

Reproductive isolation

Allopatric speciation- This occurs when biological populations of the same species become isolated from each other, creating such a long seperation that they act and reproduce differenctly.

Sympatic speciation- When a new species evolves from a single ancestral species while inhabiting the same geographic region.

Behavorial Isolation- helps members of the same species identify each other as proper mates. Such as mating rituals.

Temporal isolationTwo species that are able to reproduce physically but do not because their mating seasons differ, times they are awake/ are active.

geographical isolation-Species that are seperated from interaction by physical boundaries.

Hybridization- the crossing of two unatural mates, such as tiger and lion, to create an infertile offspring. They are not able to breed without another hybrid offspring, or not at all.


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