Infant paralysis is not a hereditary variation. Infant paralysis, also known as poliomyelitis, is a viral disease that affects the nervous system and is transmitted through contaminated food and water. It is not a genetic trait that is passed down from parents to offspring. The other options listed are all examples of hereditary variations: blood group, sickle cell trait, shape of face and nose, and colour of hair are all determined by genes that are inherited from parents.