Vitti, a computational geneticist at the Broad Institute in Cambridge, Massachusetts, thinks the app was misleading - even dangerous. The app’s creator, Joel Bellenson, a US entrepreneur living in Kampala, Uganda, based the test on the findings of a massive study on the genetics of same-sex sexual behaviour - even though the analysis, published in Science in August, concluded that a person’s genes cannot predict their sexuality 1. It took him to an app called ‘How Gay Are You?’ that purported to gauge a person’s level of attraction to others of the same sex, according to their genes. Joseph Vitti’s stomach turned when he opened a link an acquaintance had sent him. Millions of people have had their DNA analysed by consumer genetic-testing companies.
