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Males and females have different optimal values for some traits, such as body size. When the same genes control these traits in both sexes, selection pushes in opposite directions in males and females. Alleles at autosomal loci spend equal amounts of time in males and females, suggesting that the sexually antagonistic selective forces may approximately balance between the opposing optima. Frank and...
Many cells in the thorax of Drosophila were found to stall during replication, a phenomenon known as underreplication. Unlike underreplication in nuclei of salivary and follicle cells, this stall occurs with less than one complete round of replication. This stall point allows precise estimations of early‐replicating euchromatin and late‐replicating heterochromatin regions, providing a powerful tool...
A handful of studies have investigated sexually antagonistic constraints on achieving sex‐specific fitness optima, although exclusively through male‐genome‐limited evolution experiments. In this article, we established a female‐limited X chromosome evolution experiment, where we used an X chromosome balancer to enforce the inheritance of the X through the matriline, thus removing exposure to male...
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