IB Biology Topic 10.3 Speciation
Terms in this set (12)
The gene pool is the set of all genes, or genetic information, in any population, usually of a particular species.
The percentage of all alleles at a given locus in a population gene pool represented by a particular allele.
Separation of species or populations so that they cannot interbreed and produce fertile offspring
An evolutionary process in which one species splits into two or more species.
A chromosomal alteration in which the organism possesses more than two complete chromosome sets. Found in plants
Natural selection in which individuals at one end of the phenotypic range survive or reproduce more successfully than do other individuals.
Natural selection in which intermediate phenotypes survive or reproduce more successfully than do extreme phenotypes.
form of natural selection in which a single curve splits into two; occurs when individuals at the upper and lower ends of a distribution curve have higher fitness than individuals near the middle
The onion genus Allium comprises monocotyledonous flowering plants and includes the onion, garlic, chives, scallion, shallot, and the leek as well as hundreds of wild species
Pattern of evolution in which long stable periods are interrupted by brief periods of more rapid change
A proposed explanation in evolutionary biology stating that new species arise from the result of slight modifications (mutations and resulting phenotypic changes) over many generations.
the increased vigour (eg: growth, litter size, milk production) of crossbred animals
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