Question

The disease sickle cell anemia is an example of what can happen if.

Answer 1

Sickle-cell anemia is an example of codominance. This have implications for people with one or two copies of the sickle-cell gene in that People with two copies of the mutated gene have sickle-cell anemia. People with one copy of the mutated gene have both healthy and misshapen red blood cells and are carriers of the disease.

Answer 2

This is an example of Point Mutation which happens when nucleotides in DNA are either absent, removed or replaced.
Sickle Cell Anaemia is the disease in which the body makes sickle shape cells which contain Sickle Haemoglobin instead of normal haemoglobin. This haemoglobin tends to block the blood flow.
It is caused by Point Mutation in the beta chain of haemoglobin which occurs when Glutamic Acid is replaced by Valine at position number 6.