Biology 1001A Chapter Casual Cycle 7 notes: Cycle 7 Notes
26 May 2016
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Lecture 14: why sex: what are the advantages/disadvantages of reproducing asexually vs sexually, sexual reproduction places fundamentally different sexual pressured on males vs females, sex, recombination, genetic diversity: Reproducing sexually generated new combinations of alleles: ab, ab, ab, ab. Offspring distinct from either parent and usually (except in the case of identical twins) distinct from each other: sexual recombination is a source of new alleles and new combinations of alleles. So, sex is a great for evolution: can have reproduction without sex. Gene swap in bacteria--recombination in this case, but. The lizards copulate (lesbian things) with each other to get the eggs going. The amazon mollies have sex with males of a similar but different species to get their eggs going (recent evolution towards asexuality) Many plant species and some fungi are facultatively asexual vs sexual- when conditions are good, the individual reproduces asexually. If conditions get worse, the individual produces pollen, flowers, seeds to reproduce gametes with other individuals.
