Ch 23 - The Evolution of Populations (1 slide per page)-1

Accumulation of genetic changes over many generations

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Unformatted text preview: n = inherited traits + changed traits 7 2. Accumulation of genetic changes over many generations • If accumulated differences are really really really substantial may result in a new genus, family, order, class, phylum, kingdom, or domain. 8 Populations evolve, individuals do not! An individual’s genes do not change during its lifetime. • Individuals: • survive or don’t survive • reproduce w/ varying success • A population, however, may become genetically different: • than a previous generation • from another population 9 Evolution is an observable fact – We see variation between generations in gene frequencies – We have seen new species develop in our life times Many examples at http://www.talkorigins.org/faqs/faq-speciation.html • Like gravity, evolution is predictable and is thus a LAW of science • A theory is a large body of research and other evidence used to explain observable phenomena. – The theory of gravity is used in an attempt to explain how gravity works. – The theory of evolution is used in an attempt to explain how evolution works. • Like the theory of gravity, the theory of evolution is complicated but each day we understand a little more how evolution works. 10 10 Hardy Weinberg Equilibrium Allele and genotype frequencies will stay the same in a po...
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This note was uploaded on 02/12/2014 for the course BIOLOGY 2011 taught by Professor Woo during the Fall '10 term at University of Central Florida.

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