Hereditary mutations: These are inherited from a parent and are present in cells throughout an organism's life.
Acquired (or somatic) mutations: These may be caused by environmental factors, are present in certain cells and may occur at some point in an organism's life.
The nearly hairless Sphynx cat emerged as a result of a mutation that originated in 1966. This mutation affects the gene Keratin 71 and is recessive to a normal coat.
Today breeders test their cats for the mutation to ensure it will be passed on.
The average person needs seven hours of sleep, but some people only need four to six hours. These natural short sleepers are mutants: In 2019, scientists discovered they have a mutation in the gene ADRB1. Families of short sleepers carry this mutation.