Examlex
Polymorphism involves:
Maximum Parsimony
Maximum parsimony is a statistical method for reconstructing phylogenies that identifies the tree topology that minimizes the total amount of change, or the number of steps, required to fit the data to the tree.
Introgression
Introgression describes the movement of alleles from one species or population to another.
Incomplete Lineage Sorting
Occurs when a genetic polymorphism persists through several speciation events. When fixation of alternative alleles eventually occurs in the descendent species, the pattern of retention of alleles may yield a gene tree that differs from the true phylogeny of the species.
Genetic Hitchhiking
Genetic hitchhiking occurs when an allele increases in frequency because it is physically linked to a positively selected allele at a nearby locus.
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