Biology 1001A Lecture Notes - Lecture 16: Mate Choice, Limiting Factor, Evolutionary Arms Race
3 Apr 2016
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Document Summary
Cycle 7 outcomes: examples of genetic exchange/ recombination without reproduction, and of reproduction without genetic exchange/ recombination. Many living things produce asexually: ex. Bacterium with binary fission (no genetic recombination occurring: organism reproduce but not sexual, ex. lizards, reproducing but no sexual recombination. Can have transfer of genetic information that doesn"t result in reproduction: swapping genes, ex. bacteria antibiotic resistance. Recombination of alleles, new genes introduced but they don"t reproduce. Genetic exchange doesn"t always mean reproduction: right after: in some bacterium, recombination happens but they may or may not divide to reproduce immediately afterwards (sutosex) Reproduction doesn"t always involve recombination: in binary fission, there is no genetic recombination but they still reproduce, how recombination contributes to population genetic variation. Only mutation can create new alleles, but sexual reproduction can create new combination of alleles at loci. Reproducing sexually generates new combinations of alleles: ab, ab, ab, ab.
