Evolution - Evolution Definition of Evolution Changes in...

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Unformatted text preview: Evolution Definition of Evolution Changes in genotype of pop over long time Changes in line of descent Sources of Genetic Variation Mutations Crossing-over Independent assortment during meiosis Sexual reproduction Chrom abnormalities Charles Darwin 1809-1882 theology at Cambridge University naturalist on HMS Beagle Traveled for 5 years – South America Galapagos Islands – studied flora & fauna Darwin’s finches Darwin’s Finches • Galapagoscruises.be • Blackwellpublishing.com Alfred Wallace • British naturalist • Proposed same ideas of change as Darwin • Thesecondevolution.com • Wku.edu Darwin’s Premises Darwin’s Premises 1. 1. Char w/in individuals varies Char w/in individuals varies 2. 2. Pop makes more offspring than Pop makes more offspring than necessary necessary 3. 3. Some individuals have char - survive to Some individuals have char - survive to adulthood – adulthood – reproductive fitness reproductive fitness 4. 4. Some may be inheritable Some may be inheritable Donner Lake • Howstuffworks.com 53 men/36 women -beginning 53 men/36 women -beginning 48 survived 48 survived 41 died – over age 50 & younger children...
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This note was uploaded on 09/21/2009 for the course BIO 10 taught by Professor Ruthkern during the Spring '09 term at CSU Fresno.

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Evolution - Evolution Definition of Evolution Changes in...

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