diploid

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Related to diploidy: haploidy, polyploidy

diploid

Biology (of cells or organisms) having pairs of homologous chromosomes so that twice the haploid number is present

Diploid

 

an organism whose cells have a double (diploid; 2n) set of chromosomes, representing a single (haploid; n) set of paired homologous chromosomes. For example, man has 23 pairs of chromosomes (n = 23’,2n = 46), and an onion has eight pairs of chromosomes (n = 8; 2n = 16). The transition from the diploid state (diplophase) to the haploid (haplo-phase) is accomplished by the first meiotic division, as a result of which the sex cells, or gametes, are formed. When the gametes fuse, the diploid number of chromosomes is restored.

diploid

[′di‚plȯid]
(crystallography)
A crystal form in the isometric system having 24 similar quadrilateral faces arranged in pairs.
(genetics)
Having two complete chromosome pairs in a nucleus (2N).
References in periodicals archive ?
Many people consider diploidy to be the pinnacle of evolution," Otto says.
Semen analysis by electron and fluorescence microscopy in a case of partial hydatidiform mole reveals a high incidence of abnormal morphology, diploidy, and tetraploidy.
We did nor find associations with aneuploidy of chromosome 1; however, the sperm ACM-FISH assay does not effectively distinguish between disomy 1 and diploidy (Sloter et al.
In both groups, the mean frequencies of chromosome 18 disomy were within the normal range: the means of frequency of diploidy and sex chromosome disomy were higher than reference values, but only diploidy reached statistical significance (P = 0.
tropicalis has research advantages: diploidy and brief maturation time make this species ideal for genetic analyses over multiple generations (2).
In Noctiluca, the first divisions of the gamete mother-cell nucleus are believed to be meiotic (Zingmark, 1970), which would imply diploidy in these dinofiagellates.
Note that the two in these equations arises from diploidy.
In principle, analogous equations could be derived for more complicated genetic assumptions such as diploidy and linkage, but I have not explored these possibilities.
Colon cancers with MSI are more commonly seen in the proximal colon, have mucinous and poorly differentiated histologic appearance, with a lymphocytic infiltration, exhibit diploidy, and most importantly, have a more favorable prognosis.
Disomy X, Y, and 21, XY sperm, sex-null sperm, chromosome 21-null sperm, and various forms of sperm diploidy were measured separately as previously described (Baumgartner et al.
As early as 1930, Aase stated: "Haploidy may be changed to diploidy in the meiotic division through non-reduction of univalents.