frameshift mutation
base substitution , base insertions , base deletions , base inversions
nonsense mutation, missense mutation, frameshift muation, deletion or addition mutation
A gene is a sequence of bases in DNA that codes for a particular trait. A gene mutation is any change in that sequence. A base sequence in a DNA molecule must be changed.
I don't know the actual number but mutations happen constantly, even right now.
Borderlands Video Game Review
Prototype Hints, Tips and Stupider Chopper Tricks!
Learn about Gene Mutation
BRCA Gene Test for Breast Cancer