Question

Most mutations...?
(a) have no effect
(b) are fatal to an organism
(c) are helpful to an organism
(d) are harmful to an organism

Answer 1

I can't seem to get a definitive answer on this.

But beneficial mutations are rare. So it looks like most of them are neutral with harmful ones following.

So my guess is d

Answer 2

Thanks :)

Answer 3

Anytime :)