Identical twins not so identical after all: study

Paris (AFP) – Genetic differences between identical twins can begin very early in embryonic development, according to a study on Thursday that researchers said has implications for how these siblings help scientists tease out the effects of nature versus nurture.

Identical – or monozygotic – twins come from a single fertilised egg that splits in two. They are important research subjects because they are thought to have minimal genetic differences. This means that when physical or behavioural differences emerge, environmental factors are presumed to be the likely cause.

More details on Sunday’s Borneo Bulletin