What four things are necessary for evolution to take place?

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

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.

Give an example of a trait that is controlled by more than one gene.