Kit Library / Science / Evolutionary Biology
⚡ Topic Learning KitShared by a Veda learner · Generated with Veda AI
Veda Bites are swipeable micro-lessons — each one teaches exactly one idea. Here's a taste from this kit; the app has the full deck.
Sisters: more than family, an evolutionary edge.
Sisterhood in biology refers to the cooperative bonds between female kin, especially sisters. These bonds are not just social—they are evolutionary adaptations that increase survival and reproductive success. By helping relatives, females can pass on shared genes indirectly, a concept...
↳ Sisterhood is nature's way of ensuring shared genes survive.
Why help family? It's in the genes.
Kin selection is an evolutionary strategy where individuals help relatives survive and reproduce, indirectly passing on their own genes. This explains altruism among sisters: by helping a sister raise offspring, a female ensures shared genetic material continues.
↳ Hamilton's rule: help when the genetic payoff outweighs the cost.
Half your genes, all your loyalty.
Full sisters share about 50% of their genes, the same as parents and offspring. This high relatedness makes cooperation evolutionarily advantageous. In many species, sisters form coalitions to defend resources, raise young, or compete for dominance.
↳ Genetic overlap fuels sisterly solidarity.
The biology of sisterhood explores how cooperative bonds between female kin, especially sisters, are evolutionary adaptations driven by kin selection. Shared genes make helping relatives a way to pass on genetic material...
~8 min · full explanation, examples & memory tricks in the app
17 questions laddered from warm-up to topper-level, each with an explanation. A taste:
Which of the following best defines **kinship** in the context of female bonds?
BeginnerShared genetic relatedness or social ties through descent or marriage
Kinship refers to genetic relatedness or social ties that form the basis for cooperation and altruism among females.
In many social mammals, **female philopatry** leads to:
IntermediateFemales remaining in their natal group, forming close kin networks
Female philopatry means females stay in their birth group, which fosters strong kinship bonds and cooperation.
Which concept explains why a female might help her sister raise offspring instead of having her own?
IntermediateKin selection
Kin selection favors behaviors that increase the survival of relatives, thereby passing on shared genes.
**Cooperation** among unrelated females is most likely to evolve when:
IntermediateBenefits outweigh costs and reciprocity is possible
Reciprocal altruism can evolve when individuals exchange favors over time, benefiting both.
17 flashcards in this kit — the app reviews them with spaced repetition so the right card returns on the right day.
Every game is built from this kit's own content — scores feed your mastery, so playing counts as studying.
The full Veda Bites deck, complete notes, spaced-repetition flashcards, leveled MCQs, tests and games for this kit — plus Daily Facts and the Arena, every day.
