Which one guys plz answeer

The use of dna as evidence in criminal investigations became possible because of the

The picture showed normal blood cells which are around and sickle cells which appear much longer people with sickle-cell suffer from the sickle cell anemia which is inherited diseaseit is caused by a change in gene responsible for production of hemo goblin this type of change is known as an

Which of the following is not a possible effectof increasimg carbon dioxide levels in the atmosphere ?