ELI5: Explain Like I'm 5

Concordance (genetics)

Concordance in genetics is a fancy word that means how often two family members (like siblings or parents and children) have the same trait or condition. Let's say you and your brother both have blue eyes. That's an example of concordance.

Scientists use this concept of concordance to study whether certain traits or conditions are likely to be inherited from your parents. For example, if you have a family history of diabetes and you want to know if you're at risk, scientists might study the concordance of diabetes in family members to figure out how likely it is that you'll get it too.

So concordance is basically a way of looking at how genes are passed down from one generation to the next and figuring out how likely it is that certain traits or conditions will show up in different family members.
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