system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is being inbred often associated with deformities of the body/mind/etc?
gpt
It has to do with genetics, mutations, and dominant/recessive genes. If a mutation happens in a person's DNA, they can pass it on to their children. But, if the child gets one "good" piece of DNA from one parent and one "bad" piece of DNA from the other, it's possible that the mutation won't show up or cause problems. But, if two people who are related have a child, there is a higher chance that both parents inherited a mutation from a common ancestor, and the child might get TWO "bad" pieces of DNA and end up with serious problems.