Agenetic factor that blocks another genetic factor

Providing immunity by injecting the body with a weakened form a pathogen is known as

What role do traits play in affecting an organisms ability to reproduce? finches

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