The world's pigs can be divided into wild pigs (with 36 chromosomes) and domestic pigs (with 38 chromosomes), the earliest of which were domesticated from wild pigs.
世界上的豬可以分為「野豬」（染色體 36 條）及「家豬」（染色體 38 條）；最早的家豬即是由野豬馴化而來。