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13 Cards in this Set
- Front
- Back
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Monophyletic Group |
Involves total 'branch' |
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Paraphyletic Group |
Excludes at least one species |
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Polyphyletic Group |
'Nonsense', random groupings |
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Homology |
Two species share similarities due to common ancestor |
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Convergent Evolution Homoclagy |
Similar structures in unrelated organisms |
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Parsimony Principle |
Perfered explaination is the simplest one |
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Vestiges |
Evolutionary leftover that everyone has (no selection pressure) Wisdom teeth, male nipples |
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Atavisms |
Evolutionary throwbacks, abnormal Extra nipples, human tail |
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6 Assumptions of Hardy-Weinberg Equation? |
1. Random Mating 2. No environmental change 3. No gene flow (immigration-emigration) 4. No natural selection 5. No genetic drift 6. No mutations |
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Three types of Natural Selection? |
1. Directional selection 2. Disruptive selection 3. Stabilizing selection |
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Proximate cause vs Ultimate cause |
Proximate - genetic/physiological level Ultimate - evolutionary explanation |
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Allopatric vs Sympatric Speciation |
Allopatric - Populations geographically isolated Sympatric - Speciation occurs for other reasons |
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Pre-zygotic barriers vs Post-zygotic barriers |
Barriers which prevent interbreeding Pre = pre-fertilization (habitat, temporal[timing], behavioral (sexual appeal), mechanical, gamete Post = Problems with hybrid, offspring dies or can't mate |
