system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can mice be inbred?

Why can mice be inbred for 20 generations and stay healthy, while most other animals can't?

edit: answered. ty! apparently they're fucked up too.
gpt
Most animals have recessive genes that are damaging if you get two copies of the same one. However, if an animal is already inbred for many generations (like such a mouse) all the recessive genes have already been taken out of the gene pool ahead of time. Essentially, lab mice have been "bred" to be "inbred".