HOW religious you are as an adult depends at least partly on your genes, a study of twins suggests. Past studies have found that children tend to mirror the religious beliefs and behaviour of their parents. Now a team led by Laura Koenig at the University of Minnesota in Minneapolis has shown that the influence of environmental factors wanes in adulthood, while genetic factors become more important in determining how religious a person is.
The team asked 169 pairs of identical twins and 104 pairs of fraternal twins born in Minnesota, all male and in their early 30s, how often…
