BIOL110s05-30 - BIOL 110: Principles of Biology Spring 2005...

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1 BIOL 110 : Principles of Biology Spring 2005 Lecture 30, W 4/13/05 http://www.smccd.net/accounts/staplesn/biol110/ ONLINE Quizzes link: [Quiz #5 up until Thur.! #4 Results] (Cañada College I.D. [G#] for login and password) http://smcwebtest.smccd.net/accounts/staplesn/index.tpx Time-limited (so study well first!); ~ 30 minutes to complete Can view twice, submit once only. Midterm 2: Extra credit if scored <70%: Due ASAP!! Journal Reports #1 – Last Chance = this WEEK!!! Next: Ch. 14, 18 (bits of 19), 25, 23 , 29-31, 32…. . REVIEW: Ch. 12: Processes of Evolution – Darwin’s voyage, finches, – Origin of Species – Evolutionary processes TODAY: Ch. 12: Processes of Evolution – Evolutionary processes: – microevolution, mechanisms of Natural Selection Ch. 14: Origin of Life, & Microbiology – Early earth & chemical evolution – The Prokaryotes: Bacteria & Archaea
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2 C. Microevolutionary Processes Drive a population away from genetic equilibrium Small-scale changes in allele frequencies brought about by: 1. Natural selection 2. Gene flow – physical entrance and exit of new alleles into and out of a population (due to immigration and emigration) 3. Genetic drift – random change of allele frequencies in a population – favor one or few alleles over others (not by selection) V. Results of Natural Selection Three possible outcomes:
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BIOL110s05-30 - BIOL 110: Principles of Biology Spring 2005...

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