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#social behavior

2 public questions tagged with this topic.

ANIMAL BEHAVIOR

Altruistic behavior benefits:

recipient only reflects key principle in quiz on animal behavior+pyqs, where evolutionary mechanisms shape genetic variation and adaptation. In this context, recipient only aligns with experimental and theoretical evidence from population genetics, behavioral ecology and molecular phylogeny. Textbooks like Campbell Biology, Futuyma Evolution and Hartl Principles illustrate supporting data. Understanding why recipient only fits helps integrate natural selection, environment.

Ref: Alcock, Animal Behavior, Kin Selection and Social Behavior.

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SPECIATION

High sister–sister relatedness explains:

Altruism benefits recipient at cost to actor, reducing direct fitness but increasing indirect fitness via relatives sharing genes. Hamilton's rule rb>c predicts altruism evolves when relatedness times benefit exceeds cost. Relatedness 0.5 for siblings, 0.25 for half-sibs, 0.125 for cousins, 0.75 for haplodiploid sisters explains worker sterility in Hymenoptera. Inclusive fitness includes direct plus indirect components. Eusociality, alarm calls and reciprocal altruism exemplify. Hence Worker altruism captures kin selection logic underlying altruistic behavior. This concept integrates genetics, ecology and molecular evidence, frequently tested in NEET, GATE and CSIR-NET, highlighting links between genotype, phenotype and environment.

Ref: Hamilton 1964, J Theor Biol, Inclusive Fitness rb>c.

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