ME 3834 Chapter : Ch10
Document Summary
Concept 24. 1: the biological species concept emphasizes reproductive isolation. Species: latin for kind or appearance : different islands=different colors, interbreeding. The biological species concept: defines a species as a population or group of populations whose members have the potential to interbreed in nature and produce viable, fertile offspring, cannot be applied to. Organism about which little is know regarding their reproduction. Reproductive isolation: the existence of biological factors that impede members of two species from producing viable, fertile offspring, prezygotic barriers. Impede mating between species or hinder the fertilization of ova of members of different species attempt to mate: postzygotic barriers. Often prevents the hybrid zygote from developing into a viable, fertile adult. Friday, march 15, 19: zygote (fertilized egg) Concept 24. 2: speciation can take place with or without geographic separation: can occur in 2 ways. Allopatric speciation: other country , gene flow is interrupted or reduced when a population is divided into two or more geographically isolated.
