WebJan 14, 2009 · Introduction. Natural selection should favour adaptive variation in offspring sex ratio if alterations maximise the offspring's potential reproductive success [Trivers-Willard hypothesis, TWH; 1].For species where one sex has more variable reproductive success (males in polygynous species), the TWH predicts that 1) a mother with more … WebMay 11, 2016 · The Trivers–Willard hypothesis has commonly been considered to predict two things. First, that a mother in good condition should bias the sex ratio of her offspring …
Parental background and daughters’ and sons’ educational …
WebParental investment theory has been put forward as a major evolutionary argument explaining male or female biased birth sex ratio, the Trivers-Willard (T-W) hypothesis, … WebMay 11, 2016 · The Trivers–Willard hypothesis has commonly been considered to predict two things. First, that a mother in good condition should bias the sex ratio of her offspring towards males (if males exhibit greater variation in reproductive value). Second, that a mother in good condition should invest more per son than per daughter. chc everett south hours
Decades of Trivers-Willard research on humans: what conclusions …
Web9.10 Testing Trivers-Willard in humans. So, does the Trivers-Willard hypothesis apply to human populations? In short, it’s complicated. And it’s always more difficult (or really, … WebFeb 14, 2011 · The generalized Trivers-Willard hypothesis proposes that parents who possess any heritable trait that increases male reproductive success at a greater rate than female reproductive success in a given environment will have a higher-than-expected offspring sex ratio (more sons), and parents who possess any heritable trait that … WebIpoteza lui Trivers și Willard; Perspectivă evolutivă și întrebări viitoare; Referințe; Determinarea sexului este controlat de un număr de mecanisme variat între taxonomice care stabilesc caracteristicile sexuale ale individului. Aceste sisteme pot fi intrinseci individului - adică genetice - sau pot fi controlate de factori de mediu ... chc event cal