A purebred variety of cat, such as Siamese, only produces kittens with Siamese characteristics because their ancestors were inbred until they were homozygous for all of the genes that produce the physical characteristics and temperament associated with the Siamese breed.
En renrasig population av katt, såsom siames, producerar endast kattungar med siamesens egenskaper eftersom deras förfäder var inavlade tills de var homozygota för alla de gener som leder till de fysiska egenskaper och temperament som karakteriserar siamesrasen.