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| -Is sex necessary? discussion
-Asexual reproduction - any means of multiplying that does not involve both egg and sperm or similar structures. a.vegetative b. budding of smaller individuals c. parthenogenetic - developing from unfertilized egg
-Discussion of asexual vs sexual reproduction
-Asexual reproduction produces clones - genetically the same
-Some animals can be sexual and asexual EX: Bees
-Hermaphrodism - existence of reproductive organs of both sexes in the same individual Ex: plants, leaches, worms
-Evolved this way because they are fixed in place or can't move very far
-Often selective pressure to not inbreed.
-Discussion - evolutionary roles of males and females - parental investment. -Male - number of sperm he can get out - less energy - male will mate with anything - limiting factor is finding a mate. -Female - limiting factor is the egg - time investment - eggs that survive - female is choosy because of big investment - raising young.
-sexual dimorphism - male and female having different appearances - discussion of why this occurred - EX: horns and colors
-mating systems and discussion of evolution -polygynous -polygamy -polyandry -monogamy
-Ecology and mating systems - discussion relationship to area
-Altruistic behavior - behavior that favors the reproductive success not of the individual, but of another member of the species - why it evolved i.e. kin selection EX:prairie dogs
-Social insects - division of labor show how sisters are more related to each other than to mother .
-Father = haploid 100% Mother = diploid 50% Sister 3/4 related |
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