A phenomenon of inclusive fitness, used to explain altruistic behavior between related individuals.

A form of selection whereby alleles differ in their rate of propagation by influencing the impact of their bearers on the reproductive success of individuals (kin) who carry the same alleles by common [..]

Individuals share 50% of their genes with a parent or sibling, so if an individual risks its own ability to reproduce or survive but helps its parents or more than two siblings to survive or reproduce

This theory states that people are more likely to help blood relatives in difficult situations because this increases the odds that their genes will be transmitted to subsequent generations. The close [..]

A change in the frequency of an allele

Natural selection favouring the survival of relatives rather than an individual itself.

Kin selection is the theory put forward by the biologist W.D. Hamilton to explain the problem of altruism. The theory is as follows: Suppose that a rare gene for altruism is present in an individual. [..]

Differential aid or favoritism toward relatives that promote the inclusive fitness of shared genes.

The mode of natural selection that acts on an individual's inclusive fitness.

A form of selection whereby alleles differ in their rate of propagation by influencing the impact of their bearers on the reproductive success of individuals (kin) who carry the same alleles by common descent.

In sociobiology, reproductive success via genes shared with relatives; sometimes called the biology of nepotism.