Nature Nurture Debate: Born Lazy? Don't like going to the gym? Hate exercise? Now there's an excuse: new studies on mice have shown that the desire to exercise may be largely determined by genetic factors. This suggests that some people may find it easy to increase their activity levels to get healthy, while others will struggle.

New research carried out by sociologists has added to wealth of evidence that nature and nurture cannot be treated as separate factors when explaining human behaviour: human behaviour is the result of interactions between genes and the environment. Whether genes are expressed depends on environmental factors and genes themselves can change the environment.

Nature v Nurture: Homosexuality due to genes and environment The world's largest twin study indicates that homosexuality is due to both nature (genes) and nurture (the environment); however environmental factors that are specific to the individual (e.g., pre-natal exposure to hormones) are more important than shared environmental factors (e.g., parenting).