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Latest Muller's ratchet Stories

2012-08-13 11:12:47

Max Planck scientist investigates the evolutionary model of Muller's ratchet From protozoans to mammals, evolution has created more and more complex structures and better-adapted organisms. This is all the more astonishing as most genetic mutations are deleterious. Especially in small asexual populations that do not recombine their genes, unfavorable mutations can accumulate. This process is known as Muller's ratchet in evolutionary biology. The ratchet, proposed by the American geneticist...

2010-10-14 15:08:22

University of Toronto biologists identify influence of environment on sexual vs. asexual reproduction Evolutionary biologists at the University of Toronto (U of T) have found that environment plays a key role in determining whether a species opts for sexual over asexual reproduction. The study, led by post-doctoral student Lutz Becks and Professor Aneil Agrawal of the Department of Ecology & Evolutionary Biology, found that species that inhabit spatially heterogenous environments "“...

2010-01-22 00:55:51

Living organisms have good reason for engaging in sexual, rather than asexual, reproduction according to Maurine Neiman, assistant professor of biology in the UI College of Liberal Arts and Sciences and researcher in the Roy J. Carver Center for Genomics. In an article published in a recent issue of the journal Molecular Biology and Evolution, she and her colleagues, including John M. Logsdon Jr., associate professor of biology, examined the theory that sexual reproduction, while requiring...