Eli5: We have a dna correction system to avoid variations, but, sexual reproduction to promote variations. So, Are variations good?

Question

Eli5: We have a dna correction system to avoid variations, but, sexual reproduction to promote variations. So, Are variations good?

In: Biology

Answer 1

I am in no way trained or learned in biology other than highschool and what I picked up online.

We WANT diversity between organisms as it makes it harder for diseases to attack a whole population.

We DON’T WANT diversity within the same organism as it may be seen as a foreign attacker (disease for simplicity) and attack ourselves.