Autopolyploidy A type of polyploidy involving the multiplication of chromo-some sets from only one species.

通常是由同一个体，同一纯种染色体数目加而成现象。

The dog is a real thoroughbred.

这条狗是真正纯种狗。

With more than 1.6 million registered pedigree cows, Germany is the home of biggest herdbook population all over the world.

德国拥有超过160万头纯种家谱奶牛，是世界上奶牛种群之家。