That's a great way to explain the importance of epigenetic inheritance!
To add on to this thread, certain types of immune cells purposefully make use of a DNA polymerase that makes mistakes at a HIGHER rate than average. This allows for greater variation among immune cells, allowing the organism to potentially survive better in hostile environments.
Yes. If I recall well. This is why HIV and cancer are hard to target with medicine. Because they have a higher mutation rate than the immune system.
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