In contrast to homoploid hybrid species,polyploid species are easily diagnosed because of chromosome number changes associated with genome doubling.

与同杂合体物种比，因为与基因组关的染色体数目的变化,杂合体物种很容易判。

Scientists had theorized that homoploid hybrids would be more likely to form when the new species was adapted to life in an extreme environment.

家们有理论说同体混血是在极端环境下新品种更适应生存需求时出现的。