Exam 3 Study || Altruism

Based on the part 18 lecture notes.

Altruism

Behavior by an individual that increases the fitness of another individual while decreasing the fitness of the individual performing the act.

Kin Selection

Favor the reproduction success of an organism’s relatives, even at a cost to the organism’s own survival and reproduction.

Full Sibling

r = 0.5

Half Sibling

r = 0.25

First Cousin

r = 0.125

Kin Recognition

Animal’s potential ability to distinguish between close genetic kin and non-kin.

Familiarity

Animals learning to recognize individuals with whom they were raised.

Phenotype Matching

Allows animals to identify kin even if they had never previously met.

Reciprocal Altruism

A behavior where an organism acts in a manner that temporarily reduces its fitness while increasing another organism’s fitness.

E.O Wilson

Defined eusociality