BIOL 202 Study Guide - Midterm Guide: Sea Urchin, Ecological Speciation, Reproductive Isolation
23 Mar 2017
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Differences in north and west meadowlark prevent mating because although they. Prevent genetic exchange between populations look the same, they do not recognize each others song. Behavioral prezygotic barrier occuring because mating call prevents the species from mating. Zygote forms and has reduced survival and fitness. Mule is a strong animal but (cid:272)a(cid:374)"t breed with others because number of. In addition, the greater the genetic distance, the greater the isolation. Its rare to have complete reproductive isolation happen instantaneously (can happen when changes in ploidy) Most of the time, process that isolates populations is long and time shows continuum. Periods of the time in evolutionary history where 2 populations partially isolate. Natural selection favors prezygotic barriers because it prevents the production of unfit progeny (reinforcement) Natural selection also provides ecological divergence when populations are allopatric results in prezygotic and postzygotic barriers as a byproduct. This is the most frequent mechanism that contributes to barriers.
