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Created by Stefania Schoen
over 7 years ago
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Consists of all the genes, including all the different alleles for each gene, that are present in a population
The number of times an allele occurs in a gene pool, compared to the total number of alleles in that pool for the same gene
A trait controlled by only one gene; eg: shells with or without bands on snails
Trait controlled by two or more genes; eg: height
When individuals at one end of the curve have higher frequencies than individuals in the middle or at the other end
When individuals near the center of the curve have higher fitness than individuals at either end
When individuals at the outer ends of the curve have higher fitness than individuals near the middle of the curve
In small populations, individuals that carry a particular allele may leave more descendants than other individuals leave, just by chance.
Over time, a series of chance occurrences can cause an allele to become more or less common in a population.
A change in allele frequency following a dramatic reduction in the size of a population
Allele frequencies change as a result of the migration of a small subgroup of a population
When a population is not evolving and allele frequencies in its gene pool do not change
Allele frequencies in a population should remain constant unless one or more factors cause those frequencies to change
Individuals select mates based on heritable traits, such as size, strength, or coloration
Population or group of populations whose members can interbreed and produce fertile offspring
Formation of a new species
Two populations that no longer interbreed
Two populations that are capable of interbreeding develop differences in courtship rituals or other behaviors
When two populations are separated by geographic barriers such as rivers, mountains, or bodies of water
When two or more species reproduce at different times
Comparing stretches of DNA to mark the passage of evolutionary time