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 ?
These results may suggest that most aneuploid Yesso scallops died before the D-larvae stage, and aneuploid individuals closest to euploidy, especially diploidy, survived longer.
Because only one chromosome is examined in this assay, diploidy cannot be distinguished from disomy of chromosome 1.
Before therapy, FISH analysis highlighted the presence of aneuploidy, particularly diploidy and sex chromosome disomy.
The following categories of sperm aneuploidy were included as dependent variables: disomy X (sperm FISH genotype X-X-21); disomy Y (Y-Y-21); disomy XY (X-Y-21); disomy 21 (X-21-21 or Y-21-21); overall hyperhaploidy involving chromosomes X, Y, and 21 (sum of XY, disomy X, disomy Y, and disomy 21); sex nullisomy (_21); 21 nullisomy (X_ or Y_); overall hypohaploidy involving chromosomes X, Y, and 21 (sum of sex nullisomy and 21 nullisomy); and diploidy.
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.
Semen analysis by electron and fluorescence microscopy in a case of partial hydatidiform mole reveals a high incidence of abnormal morphology, diploidy, and tetraploidy.
Many people consider diploidy to be the pinnacle of evolution," Otto says.
For example, recent data have shown that a small percentage of triploid oysters progressively revert toward diploidy with age (Calvo et al.
The frequency of disomy XY18 and diploidy XY18-18 recorded for the whole group in our study is within the range reported in healthy men (9,25-27).