sickle cell anemia is caused by a mutation of one nucleotide in a gene. the type of mutation that causes sickle cell anemia is known as

equal distribution i think.

well, since there is no answer choices, i will give an answer on how it works : )

the two objects are placed together. energy will always be transferred from the hotter object to the cooler object until they are equal. hope this is close to one of the answer choices : )