Which hypothesis is based on kin selection theory?
grandmother hypothesis
The grandmother hypothesis is based on the kin selection theory by William Hamilton (1964) and ideas proposed by George Williams (1957). The kin selection theory explains helping behavior in social species.
How does Hamilton’s Rule explain kin selection?
According to Hamilton’s rule, kin selection causes genes to increase in frequency when the genetic relatedness of a recipient to an actor multiplied by the benefit to the recipient is greater than the reproductive cost to the actor. First, kin recognition allows individuals to be able to identify their relatives.
How does kin selection lead to altruistic behavior?
Kin altruism can look like altruistic behaviour whose evolution is driven by kin selection. Kin selection is an instance of inclusive fitness, which combines the number of offspring produced with the number an individual can ensure the production of by supporting others, such as siblings.
What does kin selection predict?
Kin selection theory predicts that workers voluntarily give up their own reproduction in order to aid their mother. If this were strictly the case, conflict over reproduction would not occur in colonies, and there would be no need for the queen to actively suppress worker reproduction.
How do we define kin selection?
kin selection, a type of natural selection that considers the role relatives play when evaluating the genetic fitness of a given individual. Kin selection occurs when an animal engages in self-sacrificial behaviour that benefits the genetic fitness of its relatives.
What does it mean if Hamilton’s rule is fulfilled?
Of the 10 studies in which there was demonstrated altruism, five found that Hamilton’s rule was quantitatively fulfilled, i.e. actor–recipient relatedness (r) and benefit to recipients (b) were both positive and high enough for the total indirect fitness benefit to outweigh the direct fitness cost (−c), such that rb − …
How does kin selection work?
What does Hamilton’s rule tell us?
Hamilton’s rule asserts that a trait is favored by natural selection if the benefit to others, B, multiplied by relatedness, R, exceeds the cost to self, C. Specifically, Hamilton’s rule states that the change in average trait value in a population is proportional to BR−C.
What is kin selection theory?
Definition of kin selection. : a theory of natural selection which states that a usually altruistic behavior or attribute that lowers the fitness of a particular individual is selected for if it increases the probability of survival and reproduction of related kin who possess some or all of the same genes as the altruistic individual.
What is kin selection?
Kin selection occurs when an animal engages in self-sacrificial behaviour that benefits the genetic fitness of its relatives. The theory of kin selection is one of the foundations of the modern study of social behaviour.
What is kin selection in psychology?
Kin selection is an evolutionary concept that says that people will help others who are related to them, even at a cost to themselves. Several psychological studies have shown that people feel more protective of and connected to the people related to them – the closer the relation, the stronger the feeling.
What is kin selection in biology?
kin selection. n. A biological theory stating that a gene that causes an organism to exhibit behavior detrimental to its survival will increase in frequency in a population if that behavior benefits the organism’s relatives, which will pass the gene on to subsequent generations.