Speciation and Reproductive Isolation Flashcards

Flashcards about speciation and reproductive isolation.

Habitat Isolation

Prezygotic barrier where two species encounter each other rarely, or not at all, because they occupy different habitats, even though not isolated by physical barriers

Temporal Isolation

Prezygotic barrier where species that breed during different times of day, different seasons, or different years cannot interbreed.

Behavioral Isolation

Prezygotic barrier where courtship rituals and other behaviors unique to a species prevent mating.

Mechanical Isolation

Prezygotic barrier where morphological differences prevent successful mating.

Autopolyploid

An individual that has more than two chromosome sets, all derived from a single species.

Allopolyploid

A species with multiple sets of chromosomes derived from different species.

Reproductive Isolation

The existence of biological factors (barriers) that impede members of two species from interbreeding and producing viable, fertile offspring.

Prezygotic Barriers

A barrier that prevents mating or blocks fertilization from occurring

Postzygotic Barriers

A reproductive barrier that occurs after the formation of a hybrid zygote.

Founder Effect

A type of allopatric speciation where a few individuals from a population colonize a new region.

Tetraploid

A cell or organism that has four times the haploid number of chromosomes.