Resumen de Role of sexual behaviours in sexual isolation in Drosophila
A question of interest to evolucionists addresses the role of sexual behaviour in speciation. A review of the literature on sexual isolation between closely related species of Drosophila shows that changes in sexual behaviour are minor and quantitative rather than qualitative. These changes diminish but without excluding interespecific crosses, suggesting that the basic organization of courtship is similar in related species. The conclusion arrived at is that courtship behaviour is very stable from an evolutionary point of view, and it is difficult to accept that changes in this trait can propitiate speciation in Drosophila.
