Why having sex really IS the best thing to do: Gene mapping finally proves mating is best way to evolve than self-reproduction

Having sex allows us to evolve more effectively than species which reproduce without a partner, according to tests that claim to finally prove the long-held theory.

Combining the genes of two parents – rather than one in the case of fruit flies, stick insects and other animals – allows for damaging DNA to be removed within a few generations.

Meanwhile, creatures who reproduce asexually are more likely to be lumbered with disease-causing genes for much longer, according to the study by the University of Edinburgh.