Polyploidy is a mechanism often attributed to causing some speciation events in sympatry.

多倍性常被当作引起在同一地区并种发种件一种机制。

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倍而多倍性现象。