polyploidy

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

多倍常被当作引起在同一地区物种发生物种形事件一种机制。

2.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现象。