jgm00029-Skorecki-DNA-Assertion

Since the Y chromosome consists almost entirely of non-coding DNA (except for the genes determining maleness), it would tend to accumulate mutations.

 

How does the above paragraph prove
(a) this mutation began 3300 years ago
(b) it began in Asia
(c) Aaron was the first to have it.

#1  What do they mean accumulate mutations

#1a Acquire more of the same type mutation

#1b Acquire different types of mutations

This is abstract explain ...