Because of all the resources a female will put into each egg, it makes sense, in most cases, for her to be choosy about whose genes she allows to combine with it, and to continue to invest in its growth and survival after fertilization. Anim Behav — Advance article alerts. Mol Ecol —
This organ has spines that allow females to grasp and hold mates from the inside. Bibcode : PLoSO But in a minority of species across the animal kingdom these traditional roles are reversed. Figure 3. This diversity, as well as cultural practices and human consciousness, have all led to a large amount of variation in mating systems.
Additional files Additional file 1: Table S1. Sex and evolution.
From Evolution: "Why Sex? An introduction to sex-role reversal. We thank Morgan Tingley and Robert Bagchi for invaluable statistical advice and Elizabeth Jockusch, Mark Urban, Charles Henry, and two anonymous reviewers for helpful comments that greatly improved the manuscript.
Sign in. JGV designed the study, collected and analyzed the data, and drafted the manuscript. The individuals who produce lots of small, mobile gametes are called males.