Social Behaviour

Question 1

group selection

Answer 1

natural selection can act on groups - favouring traits that benefit the group as a whole / even if don’t benefit some individuals

Question 2

altruism

Answer 2

am individual sacrifices its own fitness to benefit another individual

Question 3

kin selection

Answer 3

natural selection that favours the reproductive success of an organisms relatives, even if it comes at a cost of their own

Question 4

direct fitness vs indirect fitness

Answer 4

direct - refers to an individuals own reproductive success

indirect - helping relatives reproduce (increases # of genes shared with next gen even tho didn’t directly produce)

Question 5

inclusive fitness

Answer 5

sum of direct and indirect fitness
~ total contribution to gene pool (next gen)

Question 6

Hamiltons rule

Answer 6

a gene for altruism will spread when the benefit of helping genetically similar individuals exceeds the cost of sacrificing personal reproduction

• benefit is high for relatives
• costs to self are low
• relatedness is high

Question 7

there is a ___% change that a particular gene will get based on

Answer 7

50%

Question 8

0.5 for ___ 0.25 for ____

Answer 8

0.5 for siblings
0.25 for half siblings

Question 9

haplodiploidy

Answer 9

sisters are most closely related than to their offspring
= cooperative behaviour

males = haploid (unfertilized)
females = diploid (fertilized eggs)

Question 10

green beard effect

Answer 10

individuals with a certain trait are able to recognize and favour other individuals who share the same trait, even if not related
- increases inclusive fitness
- rare in nature