Biology 1001A Chapter Notes - Chapter 6: Genetic Recombination, Ploidy, Sexual Reproduction
27 Dec 2015
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Document Summary
Several models to precisely explain genetic recombination in various situations. Genetic recombination requires the following: 2 dna molecules that differ from one another, a mechanism for bringing the dna molecules into close proximity, collection of enzymes to cut exchange and paste dna back together. A simple model of genetic recombination into close proximity: 2 molecules of dna with similar sequence are brought together, enzymes nick the dna backbones, exchange ends and reattach, the final result is 2 recombined dna molecules them. Cutting and pasting 4 dna backbones results in one recombination event recombination occurs encompassing entire genes recombination occurs in prophase of meiosis 1. Sexual reproduction: the mode of reproduction in which male/female parents produce offspring through the union of egg and sperm generated by meiosis. Gametes: a haploid cell; egg or sperm. Haploid cells fuse during sexual reproduction to form a diploid zygote.
