Mutations . are always harmful. add new genes to a gene pool. are never beneficial to survival. give organisms what they need to survive.

Mutations deletion are always harmful. add new genes to a gene pool. are never beneficial to survival. give organisms what they need to survive.

Explanation:

It may be randomly like:

□caused by the mutation of a single gene.

OR

□genetic disorders include cystic fibrosis, sickle cell anemia, Tay-Sachs disease, phenylketonuria and color-blindness, among many others.

me and my friend did 2