Genetics frame of reference - the size of various genetic components, including DNA, a base pair, various sizes of deletions, chromosomes and genes are listed and compared with more familiar objects such as the Solar System, planets, cities, hospitals, wards, and so on.

Sickle cell disease: liver

Sickle cell disease: bone marrow expansion

Red blood cells from a person with sickle cell anaemia. These cells are not sickled as there is plenty of oxygen present. For a deoxygenated, sickled comparison see N0024943

Sickled red blood cells

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