class 18 & 19 notes Flashcards Preview

BIOL 1003 > class 18 & 19 notes > Flashcards

Flashcards in class 18 & 19 notes Deck (12):
1

sexual selection

adaptive evolution of traits that actually reduce an individaul's survivorship

2

the currency of natural selection is

reproductive success- fitness- genetic representation in fugture generations

3

decreased survivorship of the bearer of that trait if the _____

increase in evolutionary fitness outweighs the fitness cost of a shorter life

4

two components of sexual selection

intrasexual selection, intersexual selection

5

intrasexualselection

competition among members of same sex- sperm competition etc, large body

6

intersexual selection

compete for females

7

how do females chose mates

direct benefit models for mate choice, indirect benefit models for mate choice

8

direct benefit models for mate hoice

resources and individual chosen to be mate controls

9

polgyny threshold model

polygyny favored, best strategy for F to chocse already mated male, share resources with one or more females if cost of such sharing is more than compensated by the benefit gained by access to those resources

10

indirect benefit models for mate choice

fisherian runaway selection, good genes

11

fisheria runaway selection

characteristic used by one sex to chose members fo the opposite sex as mates may be aribtrary- sex sons

12

good genes

female choice drives evolution of male characteristcs

Decks in BIOL 1003 Class (57):