You are watching: List three sources of genetic variation
Three sources of genetic variation space mutation, genetic recombination during sexual reproduction and lateral gene transfer.
Natural selection on a single-gene traits have the right to lead to transforms in allele frequencies and, thus, to adjust in phenotype frequencies. Natural choice on polygenic characteristics can affect the relative fitness of phenotypes and thereby create one the three varieties of selection: directional selection, stabilizing choice or disruptive selection.
IN tiny populations, individuals that carry a details allele might leave much more descendants 보다 other people leave, simply by chance. End time, a collection of chance occurrences can reason an allele come become more or less usual in a population.
predict 5 conditions:1: nonrandom mating2: small population size3: immigration or emigration4: mutations5: herbal selection
idea that states that if a population is not evolving genetic equilibrium will be reached and maintained
When populations become reproductively isolated, they have the right to evolve right into two separate species. Reproductive isolation can build in a range of ways, including behavioral isolation, geographical isolation and also temporal isolation.
According come this hypothesis, speciation in Galápagos finches occurred by founding of a brand-new population, geographic isolation, alters in the brand-new population"s gene pool, behavioral isolation, and ecological competition.
A molecule clock uses mutation rates in DNA to estimate the time that two types have to be evolving independently.
One way in which new genes evolve is with the duplication, and also then modification, of currently genes.
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Small changes in Hox gene task during embryological advancement can produce huge changes in adult animals.
uses DNA comparisons to estimate the length of time the two varieties have been evolving independently