BIOL 101 Chapter Notes - Chapter 24: Meiosis, Reproductive Isolation, Allele Frequency
Document Summary
Species united by reproductively compatibility reproductive isolation the existence of biological factors (barriers) that impede members of two species from interbreeding and producing viable, fertile offspring. Barriers block gene flow between the species and limit creating of hybrids (offspring from interspecific mating) Prezygotic barriers (before the zygote) blocks fertilization from occurring impede mating or hinder fertilization after mating does occur. Impedes members of different species from attempting to mate by preventing an attempted mating from being completed successfully. If sperm cell overcomes prezygotic barriers there are postzygotic barriers. Habitat isolation species occupying different habitat will rarely encounter each other because isolated by physical barriers i. e. mountain range etc. Temporal isolation species that breed during different times of the day, different seasons, or different years can not mix their gametes. Behavioral isolation courtship rituals are specific to a species and do not enable different species to identify potential mates of other species.
