BIOL359 Chapter Notes - Chapter 8: Malathion, Linkage Disequilibrium, Genetic Recombination
26 Apr 2013
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Chapter 8: evolution at multiple loci: linkage and sex. Many species are capable of both sexual & asexual reproduction: parthenogenesis: offspring develop from unfertilized egg, no male participation, females produce live-born genetically identical to themselves. Which reproduction mode is better: sexual or asexual: the null model for population that reproduces sexually and asexually. Female"s reproductive mode does not affect the # of offspring. Female"s reproductive mode does not affect the probability of offspring survival: asexual females produce 2x as many grandchildren as sexual females constitute larger fraction of the population every generation, population destined to be overwhelmed by asexuals. However, asexual takeovers do not seem to have happened very often null model is violated: 1. The # of offspring varies depend on whether the female is sexual or asexual. Fathers provide resources or other forms of parental care in minority of species, majority just provide genes: 2.
