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A-Z listing (archived)plugin-autotooltip__plain plugin-autotooltip_bigA-Z listing (archived)

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Last updated : March 2021

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Abracadabra etymology

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Wikenigma - an Encyclopaedia of Unknowns Wikenigma - an Encyclopaedia of the Unknown Science

Sexual reproduction

“The maintenance of sexual reproduction in a highly competitive world has long been one of the major mysteries of biology given that asexual reproduction can reproduce much more quickly as 50% of offspring in sexual reproduction are males, unable to produce offspring themselves.”
Source: Wikipedia

Put another way, from an evolutionary perspective, sexual reproduction would need to provide an advantage of more than 50% to be maintained as viable in the long term.

Several theories have been proposed. A 2015 hypothesis (from the University of East Anglia, UK) suggests that :

“In the absence of sex, populations accumulate deleterious mutations through a ratcheting effect where each new mutation takes a population closer to extinction. Sexual selection helps to remove those mutations, enabling populations to persist against the threat of extinction.”
Source: phys.org

There are however many organisms that have maintained extensively successful populations over millions of years apparently asexually, see wikipedia

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