How do parents adjust the sex ratio of their broods? A. The mechanisms are large
ID: 218179 • Letter: H
Question
How do parents adjust the sex ratio of their broods? A. The mechanisms are largely unknown, but substantial evidence indicates that the parents can and do adjust the sex ratios of their brood. B. Parents can not adjust the sex ratios of their broods. C. Sex ratios adjustment only occurs in role-reversed species, so males choose which gender survives. D. Sex ratio adjustment only occurs in social insects, where females control the sex of the offspring by fertilizing (female) or not (male) their eggs. How do parents adjust the sex ratio of their broods? A. The mechanisms are largely unknown, but substantial evidence indicates that the parents can and do adjust the sex ratios of their brood. B. Parents can not adjust the sex ratios of their broods. C. Sex ratios adjustment only occurs in role-reversed species, so males choose which gender survives. D. Sex ratio adjustment only occurs in social insects, where females control the sex of the offspring by fertilizing (female) or not (male) their eggs. A. The mechanisms are largely unknown, but substantial evidence indicates that the parents can and do adjust the sex ratios of their brood. B. Parents can not adjust the sex ratios of their broods. C. Sex ratios adjustment only occurs in role-reversed species, so males choose which gender survives. D. Sex ratio adjustment only occurs in social insects, where females control the sex of the offspring by fertilizing (female) or not (male) their eggs.Explanation / Answer
Answer:
A. The mechanisms are largely unknown, but substantial evidence indicates that the parents can and do adjust the sex ratios of their brood.
Explanation:
Parents may be selected to adjust the sex ratio of their offspring when parental expenditure yields different fitness returns from sons and daughters. This prediction is clear when parents produce only one offspring per reproductive attempt, but more complicated when parental resources are shared by several offspring, and parents may potentially influence the resource allocation among offspring as well as their number and sex.
The mechanisms are largely unknown but substantial evidence indicates that parents can and do adjust the sex ratios of their broods.
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