0 having two sets of chromosomes (= structures containing chemical patterns that control what a plant or animal is like), one from each parent -- 二倍的，二倍體的（具有兩套分別來自父體和母體的染色體）
a diploid cell 二倍體細胞
In tetraploid mapping, this drift error can be substantially reduced compared with diploid mapping.
In addition, polyploid forms of plants can adapt to more extreme conditions than their diploid relatives and are thus of great practical value.
Inbreeding depression in diploid, tetraploid, and hexaploid crested wheatgrass.
Despite the different diploid number, marked similarities between the complements were noted.
Both regions were found to be highly variable among natural diploid populations, but not among triploids (or tetraploids).
In either case, the progeny of such matings would give rise to subsequent generations of normal diploid schistosomes.
Since the meiotic chromosomes in the female perform no crossing-over, tetraploid females are as fertile as diploids.
This implies that diploid individuals tend to ' mask ' deleterious mutations with ' normal ' alleles carried on the homologous chromosomes.
