Dr Helena Cronin, co-director of the Centre for Philosophy of Natural and Social Science at the London School of Economics, discusses “sexuality after genetics”. Why are males and females so different? Why would one identical twin be gay while the other is straight? Dr Cronin, who specialises in the genetics of gender and sexuality, also explains why she thinks there are “more Nobels and more dumbbells” among men than among women (it has little to do with our early environment, she says).
