system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 why inbreeding causes genetic defects.
gpt
Inbreeding itself doesn't cause genetic defects.  The issues lies when family members have genetic disorders that usually don't show up in the offspring unless they mate with another person who has that same genetic disorder.  Let's say that your family has a genetic disorder for webbed feet.  Your offspring isn't going to have webbed feet unless you mate with another person who has that same genetic disorder.  Now if you mate with someone in your family, chances are much higher for your offspring to have that genetic disorder show up.


Chances are, a huge chunk of our population is carrying genes that could be activated in our off springs.  Yet because we aren't fucking our brothers and sisters, those genes are a lot less likely to be activated.