BIOL 1202 Study Guide - Midterm Guide: Influenza A Virus Subtype H3N2, Vvvv, Evolutionary Developmental Biology
Document Summary
Anything that decreases or completely gets rid of gene flow between populations: bar example, populations can be spread out geographically or temporally (nocturnal vs. non nocturnal, prezygotic vs. postzygotic barriers, prezygotic barriers impede mating or hinder fertilization if mating does occur, habitat isolation >> geographic, ecological isolation, behavioral (mate choice) isolation, temporal isolation >> time: seasonal or day/night, mechanical isolation >> different species use different mechanisms to deliver the sperm to the egg, gametic isolation >> which sperm can actually get into the egg, postzygotic barriers prevent a hybrid zygote from developing into a viable, fertile adult (same bar, same time, etc. , reduced hybrid viability >> when hybrids are very weak, usually can"t reproduce, reduced hybrid fertility, hybrid sterility, hybrid breakdown >> reduced viability or fertility occurs in the offspring of hybrids, speciation: the process by which new species form a.
