Lecture 3 - Evdience for Evolution

Lecture 3 - Evdience for Evolution - Natural Selection 1....

Info iconThis preview shows pages 1–20. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Natural Selection 1. Phenotypic variation among individuals. 2. Inheritance (genetic basis) 3. Differences in survival and reproduction (fitness) related to that variation. 4. More individuals born than can survive. Those that have the highest fitness are the individuals with favorable variations, with respect to the env. This leads to evolutionary change and adaptations. Natural Selection Typical individuals DDT resistant mutants Selection imposed by DDT spraying Resistant individuals have a higher fitness and pass their genes on to next generation Adaptation to DDT-environment Evolutionary change Does the environment itself cause traits to change? No Does the environment itself cause traits to change? How important is genetics? Do all individuals change slowly over time? Charles Darwin collected abundant evidence for evolution in 1859. Artificial selection Vestigial structures Homology Fossils Evidence for natural selection Evidence from artificial selection Breeders decide which traits result in higher reproduction Brassica oleacae...
View Full Document

Page1 / 52

Lecture 3 - Evdience for Evolution - Natural Selection 1....

This preview shows document pages 1 - 20. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online