The Evolution of Sex
In an article published in the journal Science, scientists showed that the evolution of the sexes in simple organisms, such as unicellular algae, began with the isolation and increase of specific gender roles using DNA and incorporating already-existing genes, giving rise to new features. This data provided the first confirmation of a model of the evolution of the two sexes, according to which the development and the increase of the DNA responsible for sexual dimorphism created genetic diversity, followed by giving already- existing genes new functions associated with the production of germ cells. James Youmans, the lead author of the work, a researcher at the Salk Institute for Biological Studies, said, “Until now, no one had insights based on experiential observation on how the evolution of sexual dimorphism in a given species took place, and what genetic changes are necessary for it”.
16 April 2010