A mutation that could be inherited by offspring would result from-?

Along with substitutions, mutations can also be caused by insertions, deletions, or duplications of DNA sequences. Some mutations are hereditary because they are passed down to an offspring from a parent carrying a mutation through the germ line, meaning through an egg or sperm cell carrying the mutation.

Explanation:

answer; a male inherits only one allele of the x-linked gene controlling hair color;

i would say it is