Sickle cell anaemia disease is an example of which type gene mutation ______________.

The correct option is A Transition
Transition, in genetics and molecular biology, refers to a point mutation that changes a purine nucleotide to another purine or a pyrimidine nucleotide to another pyrimidine. Sickle cell anaemia disease is a group of disorders that casue red blood cells to become misshapen and breakdown. Sickle cell anaemia disease is an example of transition type gene mutation.