Gay “switch”
Homosexuality in fruit flies can be switched on and off by using drugs to alter the strength of nerve-cell junctions in male flies’ brains. The changes make males unable to sense a pheromone that normally stops them mating with other males (Nature Neuroscience, ).
Black and white
James Watson, the DNA pioneer who sparked a public outcry by claiming that black Africans are less intelligent than whites, has 16 times more genes likely to be of black origin than has the average white European. Icelandic company deCODE Genetics analysed Watson’s genome after he had made it…
