Researchers often compare the differences between identical and fraternal twins to better understand health and behaviour.
The first major insight is that genes and environments almost always combine to influence our life trajectory. Sometimes the largest factor is genetics (think genetic disorders). Sometimes it’s environment (think infections). Mostly, it’s somewhere in between.
Such studies have accelerated the search for genes and environmental agents that cause or trigger diseases. This has helped us understand, treat and even prevent diseases. As twin research has matured, it has progressed to addressing important questions about when and how diseases originate.
So what has research from twins taught us about specific diseases and the human body?
Read more at The Conversation