A region in which genetically distinct populations come into contact and produce offspring off mixed ancestry. This process is known as hybridisation.
See hybrid zone and hybrid. If new species are formed by hybridisation the hybrids must have higher fitness than the parental forms, they can achieve this by occupying new niches.
The probability that an individual taken at random from the population will be autozygous.
Reduction, in inbred individuals, of the mean value of a character (usually one correlated with fitness).
A genetic difference between populations that prevents or restricts gene flow between them. See reproductive isolation.
Species are defined on the basis of consistent morphological differences. See also biological species concept and phylogenetic species concept.
An imprint of a fossil. See also cast.
Differential reproductive success. Produces descent with modification, i.e. evolution.
Predicts that alleles are fixed at a constant rate for a given gene over long periods and that most molecular variation is selectively neutral.
The method of naming species of animals and plants scientifically.
GeologyRocks