Evolution & Society Flashcards
1
Q
Allele
A
gene variant
2
Q
population
A
contiguous group of breeding individuals
3
Q
Mechanisms of change
A
- Selection (Fitness advantage)
- Randomness (Drift)
- Movement (gene flow)
- Mutation (direct change to genes)
4
Q
Plato
A
(427-347 BCE)
- Typo-logical thinking: based on the idea that species are unchanging, any variation present is misleading or unimportant.
- Organisms were perfect and fixed
- Variation within species is noise to ignore
5
Q
Aristotle
A
(322-384 BCE)
- species are fixed
- some are “better” than other
6
Q
Lamark
A
(1809)
-Species climb the ladder through evolution
7
Q
Charles Darwin
A
- Decent with modification
- Species change throughout time
- All share a common ancestry throughout all species
8
Q
Darwin’s 4 Postulates
A
- There is variation among individuals in a population
- Some of this variation is heritable
- more offspring are produced than can possibly survive, producing a struggle for survival
- Individuals with particular heritable traits are more likely to survive
9
Q
Natural selection occurs when…
A
- Heritable variation is present
- Deferential fitness outcomes
10
Q
adaptive state
A
condition of a trait that conveys a reproductive advantage
11
Q
schematic for selection
A
correlation between heritable traits and variation in reproductive success
