On the optimal sex ratio.
نویسندگان
چکیده
منابع مشابه
Evolution On the optimal sex ratio ( optimality / evolutionary stability )
The equilibrium structures for various multiallele sex-determining genetic models of panmictic populations with sex expression depending on the genotypes of either the zygote or a parent are described. Even-sex-ratio equilibrium surfaces can exist apart from equilibrium points having coincident male and female allelic frequency sets. The latter (symmetric) equilibrium states entail biased sex r...
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Introduction In a prospective analysis on women who had discontinued contraception to start pregnancy, Weinberg et al. (1995) uncovered new data on the notion of why some conceptions result in boys, while others result in girls. The length of the follicular phase (from the onset of the menses to ovulation) was found to be related to the sex of the baby in 133 pregnancies that survived to delive...
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There are three sex ratio strategies (SRS) in nature-male-biased sex ratio, female-biased sex ratio and, equal sex ratio. It was R. A. Fisher who first explained why most species in nature display a sex ratio of ½. Consequent SRS theories such as Hamilton's local mate competition (LMC) and Clark's local resource competition (LRC) separately explained the observed deviations from the seemingly u...
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An interesting feature that multiple sclerosis (MS) shares with many other immune-mediated diseases is that susceptibility is higher in females than males. 1,2 However, the female-to-male ratio (sex ratio) of MS appears to vary significantly in time and space. A recent meta-analysis of epidemiological studies has shown that the worldwide sex ratio of MS has been substantially increasing over th...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1983
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.80.19.5931