The Maternal Dominance Hypothesis: Questioning Trivers and Willard
نویسندگان
چکیده
منابع مشابه
The maternal dominance hypothesis: questioning Trivers and Willard
Thirty years ago, Trivers and Willard (1973) hypothesized that parental “condition” could be central in influencing the sex ratio of offspring, “good condition” being associated with the conception of males. However, I argue that “condition” is a distraction in this otherwise useful hypothesis, because it is merely a frequent indicator of dominance (a characteristic which often leads to priorit...
متن کاملThe Trivers-Willard hypothesis: sex ratio or investment?
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. These two predictions differ empirically, mechanistically and, as we dem...
متن کاملBeautiful parents have more daughters: a further implication of the generalized Trivers-Willard hypothesis (gTWH).
The generalized Trivers-Willard hypothesis (gTWH) [Kanazawa, S., 2005. Big and tall parents have more sons: further generalizations of the Trivers-Willard hypothesis. J. Theor. Biol. 235, 583-590) proposes that parents who possess any heritable trait which increases the male reproductive success at a greater rate than female reproductive success in a given environment will have a higher-than-ex...
متن کاملSex Differences in Intergenerational Income Transmission and Educational Attainment: Testing the Trivers-Willard Hypothesis
From an evolutionary point of view, sex differences in intergenerational transmission of income may be influenced by the Trivers-Willard (T-W) effect: Low status parents should invest more in daughters, whereas high status parents are expected to invest more in sons. This bias in parental investment may result in status-dependent sex biased parental support for higher education and educational ...
متن کاملBig and tall parents have more sons: further generalizations of the Trivers-Willard hypothesis.
This paper proposes the generalized Trivers-Willard hypothesis (gTWH), which suggests that parents who possess any heritable trait which 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, and parents who possess any heritable trait which increases female reproductive success at a gre...
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ژورنال
عنوان ژورنال: Evolutionary Psychology
سال: 2003
ISSN: 1474-7049,1474-7049
DOI: 10.1177/147470490300100106