Parent is equally related
to all offspring, but
offspring are less related
to sibs than themselves.
Assuming full siblings,
i.e. r = 1/2
Level of parental investment
Benefit or
cost to
parent
B
C
B - measured in +units of RS of current offspring
C - measured in - units of RS of future offspring
| Previous slide | Next slide | Back to first slide | View graphic version |