Help me with this last question please

People with failed or impaired kidneys may have difficulty eliminating waste and unnecessary water from their blood. Dialysis is an artificial way of carrying out this process. ( I don't really know but i hope this helps)

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.