Genetic predisposition means that someone has a greater chance of having a certain trait or disease because they inherited certain genes from their parents.
Think of it like building blocks- just like you build tall towers by stacking blocks over one another, your genetic make-up is also formed by stacking your parents' genes in a certain way.
Sometimes, certain traits or diseases are more likely to occur in certain families because of the genes that they have in common. For example, if your family has a history of heart disease or diabetes, you might have a higher chance of having those conditions too, because you inherited those genes.
However, having a genetic predisposition doesn't mean that someone will definitely have a certain trait or disease- it just means that they have an increased likelihood of having it. Many other factors like lifestyle choices, environment, and chance still play a role in determining whether someone actually develops a trait or disease.
So, having a genetic predisposition is kind of like having a greater chance of winning a prize in a raffle- you might not win, but you have a higher chance than some other people.