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.
• 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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