LIFESCI 15 Lecture Notes - Lecture 8: Gestational Diabetes, Asteroid Family, Fetus
Document Summary
Receiving gifts (and favors) properly is as important as giving gifts: thank-you notes, acknowledgment of debts, eye contact, using names, assurances of future reciprocity are motivating. Unexpected cooperation: ants, bees, wasps: female = diploid, males=haploid. Daughters: all females get all of father"s genes & only half of mother"s genes. Better to give up reproduction & care for sisters. See lots of assistance with sisters but less reproduction: naked male rats. All individuals in populations have extremely high coefficient of relatedness with each other (b)(r)-c >0. Thm #1 when r is really large (as in inbred species), cooperation. What does kin selection say: there should be some conflict: because r=0. 5, rather than 1. 0, fetus: pumps out a hormone (hpl) that dilates mother"s blood vessels. Gives fetus more food: mother: increases insulin production. Escalation continues: might cause gestational diabetes (will go away after pregnancy) if mother can"t mount sufficient response to the fetus" manipulation.
