BIOL 1202 : 1202 EXAM 1 MATERIAL
Document Summary
Biology 1202: descent with modification: a darwinian view of life, what is evolution and adaptation, evolution: two main ideas, 1. Change over time of the genetic composition of a population: 2. Individuals in a population vary in their heritable characteristics: organisms produce more offspring than the environment can support. Natural selection is always operating, but which traits are favored depends on the context in which a species lives and. In sexually reproducing organisms, sexual recombination produces most of the variability in each generation: crossing over during prophase i. No gene flow: no migration among populations, 4. Migration high = little genetic variation between populations. Intrasexual selection: direct competition among individuals of one sex for mates of the opposite sex. Individual has more than two chromosome sets, all derived from a single species (double: allopolyploidy, species with multiple sets of chromosomes derived from different species, add up, sympatric speciation example. Abiotic synthesis of small organic molecules: 2.
