DNA Repair as the Primary Adaptive Function of Sex in Bacteria and Eukaryotes pp. 1-50
Authors: (Harris Bernstein, Carol Bernstein, Richard E. Michod, Department of Cellular and Molecular Medicine, University of Arizona, USA)
Abstract: The essential feature of sex common to both bacteria and eukaryotes
is information exchange (recombination) between two genomic DNA
molecules derived from different individuals. In bacteria a naturally
occurring sexual process termed transformation is characterized by
transfer of DNA from one bacterium to another, followed by
recombination between the resident DNA and the incoming DNA. In
eukaryotes, the sexual cycle involves recombination between paired DNA
molecules (chromosomes) in which the two DNA molecules are derived
from two different parents. This process occurs in diploid cells during
meiosis, and is followed by formation of haploid gametes. The fusion of
gametes from different individuals to generate diploid progeny completes
the eukaryotic sexual cycle.
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