The global male-bias in sex ratio at birth is sustained by the sex ratio genotypes of replacement offspring
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چکیده
منابع مشابه
Male pygmy hippopotamus influence offspring sex ratio
Pre-determining fetal sex is against the random and equal opportunity that both conceptus sexes have by nature. Yet, under a wide variety of circumstances, populations shift their birth sex ratio from the expected unity. Here we show, using fluorescence in situ hybridization, that in a population of pygmy hippopotamus (Choeropsis liberiensis) with 42.5% male offspring, males bias the ratio of X...
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Efforts to test sex ratio theory have focused mostly on females. However, when males possess traits that could enhance the reproductive success of sons, males would also benefit from the manipulation of the offspring sex ratio. We tested the prediction that more-fertile red deer males produce more sons. Our findings reveal that male fertility is positively related to the proportion of male offs...
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There is strong evidence that the sex ratio at birth is partially determined by environmental and social factors. The modern change in those factors serves as an explanation for the secular decline in sex ratio at birth in most of the industrialized countries. This article is the reexamination of the results from my previous communication in which no trend in sex ratio at birth was established ...
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-We study a simple model describing the genealogic structure of a population in which the sex ratio of offspring varies with a parent's position in a social hierarchy. This model is based on species in which one sex disperses and in which rank in a stable social hierarchy for the other sex is "inherited" by the offspring of that sex. We find that biased production of offspring in such a social ...
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Conditions experienced during embryonic development can have lasting effects, even carrying across generations. Most evidence for transgenerational effects comes from studies of female mammals, with much less known about egg-laying organisms or paternally-mediated effects. Here we show that offspring sex can be affected by the incubation temperature its father experiences years earlier. We incu...
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ژورنال
عنوان ژورنال: Genetica
سال: 2019
ISSN: 0016-6707,1573-6857
DOI: 10.1007/s10709-019-00074-2