BILD 3 Lecture Notes - Lecture 14: Chemical Bond, Gene Flow, Eastern Newt
30 May 2016
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Document Summary
Distance methods, maximum likelihood methods, bayesian methods, etc. Process of one population dividing into two where they can no longer interbreed. 8. 7 million (plus minus 1. 3 million) suspected species currently alive. Divergence of a lineage to create new species. Species is a group whose members have the potential to interbreed in nature. No viable zygote is formed (usually no mating at all) Occurs after the sperm and egg meet together. Could be in the same location but are in different habitats (some in water, some in trees) One species breeds in different time periods of the year. Not the correct courtship dance or song, etc. Don"t have the wrong kind of chemical bond between sperm and egg. Two species of green lacewings that are morphologically identical. Courtship -- male and female engage in a duet: male initiates song and female. Mating occurs but offspring not viable or fertile due to. Mating or lack of mating is hard to observe.
