Feb 7 - February 7, 2011 Midterm February 24th Sample exam...

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February 7, 2011 Midterm February 24 th Sample exam already on webpage ( www.rutgers.edu/~ssukhdeo ) - Bottleneck effect: disaster occurs and wipes out almost an entire population leaving only a small population to reproduce on its own (i.e. all native people in the Americas tend to be type “O”, which is a rare blood type) - Founder effect- a part of the population breaks apart from the rest of the population and begins to reproduce on its own - Gene pool = all the genes in a population - Microevolutionary mechanism (what can cause change): o Natural selection o Mutation o Genetic drift o Gene flow = gain or loss of alleles from a population due to migration of individuals Immigration – moving into an area Emigration- moving out of an area - Over time, the above mechanisms can cause speciation o Species A, over time, becomes Species B (cannot produce live fertile young) Certain mutations and change effect certain parts of the body which could allow the two people not to breed anymore
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Feb 7 - February 7, 2011 Midterm February 24th Sample exam...

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