why inbreeding is bad
Best Answer: Inbreeding doesn't *cause* mutation. The main reason why inbreeding is bad is because it increases the chance of a harmful recessive mutation being expressed.To explain: if a harmful mutation is recessive, you need to inherit it from both parents before it is actually expressed.he other issue with inbreeding is more of a long-term thing. Diversity increases the ability of a population to defend itself against diseases, because some members will be immune to a given disease which affects others. If you reduce diversity, the chances of at least some members surviving a plague are lower.