Chapter 14: Nonadaptive Evolution and Speciation – Study Guide
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The study of the genetic makeup of populations and how genetic composition
total collection of alleles in a population
the relative proportion of an allele in a population
change in allele frequencies between generations that occurs purely by chance
a type of genetic drift in which a small number of individuals leaves one population and
establishes a new one
type of genetic drift that occurs when a population is suddenly reduced to a small
number of individuals and alleles are lost from the population as a result.
movement of alleles from one population to another, which may increase the genetic diversity
of a population
Mating between closely related individuals
high frequency of homozygous individuals possessing harmful recessive
[BIOLOGICAL SPECIES CONCEPT]
Different species cannot mate because they are reproductively isolated
mechanisms that prevent mating (and therefore gene flow) between members
of different species
When one population (species) genetically diverges over time to form two species