User:I am not a dog/sex ratio
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The sex ratio is the ratio of males to females in a population of organisms. Usually this ratio is approximately 1:1 -- for example the human sex ratio. The classical explanation for why this is has been described by A.W.F. Edwards as "probably the most celebrated argument in evolutionary biology"[1], and is generally attributed to R.A. Fisher[2], hence 1:1 ratios are "Fisherian" (but see Edwards 1998[1]). Skewed sex ratios (also non-Fisherian sex ratios or extraordinary sex ratios) require special explanations.
[edit] The classical explanation
Small population size, sampling effect (genetic drift of the Y chromosome), skewed.
[edit] References
- ^ a b Edwards, A.W.F. 1998. Natural Selection and the Sex Ratio: Fisher's Sources The American Naturalist, Vol. 151, No. 6 (Jun., 1998), pp. 564-569
- ^ Fisher, R.A. 1930 The Genetical Theory of Natural Selection, Clarendon Press, Oxford
