BIOL 243 Lecture Notes - Lecture 4: Species Problem, Sympatric Speciation, Snow Goose
5 Apr 2015
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Document Summary
Micro: short term as compared to macro evolution which is over a long term. In order to tell whether speciation is occurring, we have to know what speciation is. Species concept: framework in which you can organize your species: different concepts place dif. emphasis on various factors. Case study: white snow goose could mate with blue goose, even though they don"t look the same . Reproduction: puts the emphasis on their ability to make offsprings further emphasis the importance of gene flow . How do to similar species maintain genetic isolation from each other if they come back into contact with each other . One plant attracts birds for its pollinator while the other attracts moths. the bird pollinated species will only deliver it to other individuals that have adaptations of bird pollination. The egg doesn"t recognize the sperm in coral spawning genetic incompatibility: postzygotic. after the zygote is made. fate of zygote.
