History of Life Vocabulary #3
Terms in this set (26)
A trait that helps an organism survive and reproduce
Number of times that an allele occurs in a gene pool compared with the number of alleles in that pool for the same gene
living separated from each other
English natural scientist who formulated a theory of evolution by natural selection (1809-1882)
a local population of organisms that have similar genes, interbreed, and produce offspring
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 ability of natural selection to maintain diversity in a population.
the belief that only the organisms best adapted to existing conditions are able to survive and reproduce.
movement of alleles from one population to another
Combined genetic information of all the members of a particular population
a sudden reduction in the number of alleles in a population
A change in the allele frequency of a population as a result of chance events rather than natural selection.
situation in which allele frequencies remain constant
p^2 + 2pq + q^2 = 1
Form of natural selection in which the entire curve moves; occurs when individuals at one end of a distribution curve have higher fitness than individuals in the middle or at the other end of the curve
Change over time
Ability of an organism to survive and reproduce in its environment
Maintains recessive alleles in a population,
darkening of populations of organisms over time in response to industrial pollution
Determined by a number of factors, including genetic qualities, overall health, and potential parenting skills of prospective mates
Change in allele frequencies in a population over generations.
Fixation (of alleles)
the change in a gene pool from a situation where there exists at least two variants of a particular gene (allele) to a situation where only one of the alleles remains
change in allele frequencies as a result of the migration of a small subgroup of a population
Form of relocation diffusion involving permanent move to a new location.
A change in a gene or chromosome.
A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits.
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