ploidy


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ploi·dy

(ploy'dē),
The number of haploid sets in a cell. Gametes normally contain one; somatic cells two.
See also: polyploidy.
[-ploid + -y, condition]

ploidy

(ploi′dē)
n.
A multiple of the basic number of chromosomes in a cell.

ploidy

[ploi′dē]
Etymology: Gk, eidos, form
the status of a cell nucleus in regard to the number of complete chromosome sets it contains.

ploi·dy

(ploy'dē)
The number of haploid sets in a cell. Gametes normally contain one; autosomal cells, two.
See also: polyploidy
[ploid + -y, condition]

ploidy

The number of copies of the set of chromosomes in a cell. A normal diploid cell with two copies has a ploidy of two; a haploid cell with one copy, such as an ovum or a spermatozoon, has a ploidy of one.

ploidy

the number of chromosome sets making up the total genome of an organism.

Thus the ploidy of normal humans is two and is written 2n. See DIPLOID (1).

References in periodicals archive ?
The continuous flow of genes across and within ploidy levels in
To develop successful molecular markers for ploidy identification, a large number of loci must be tested in combination(Chambers and MacAvo, 2000).
Deoxyribonucleic acid ploidy and cell cycle analysis of colorectal carcinoma by flow cytometry: A prospective study of 137 cases using fresh whole cell suspension.
Fluorescence in situ hybridization and immunohistochemical analysis of p53 expression in endometrial cancer: prognostic value and relation to ploidy.
Increasing of ploidy in cell populations is one of the universal reactions that develop in response to destructive influence of environment and is aimed at the preservation of sustainability that is crucial to system viability.
Ongoing studies in Behavioral and Evolutionary Ecology include : (1) understanding the dynamics of mating strategies in small mammals, (2) understanding the role of hybridization in the survival of amphibians and the response of bottomland tree species to changes in flooding regimes, (3) understanding the impact of chromosomal integrity and ploidy on organisms and natural populations, and (4) understanding the role of enzymes and blood proteins in the population dynamics of cotton boll weevils, kangaroo rats, crayfish, fish, and amphibian populations.
Some plant crops, there could be four copies of each gene, eight copies, and these multiple ploidy [the number of complete chromosome sets in a nucleus] levels pose a significant challenge to a lot of technologies," says Kellie Watson, director of Business Development at Pyrosequencing.
Most of these techniques measure one or more physical parameters of the cell and are, consequently, indirect measures of ploidy (toe pad cell size, Green, 1979; Chaffin and Trauth, 1987; erythrocyte cell size, Bogart and Wasserman, 1972; Matson, 1990; nuclear diameter, Cash and Bogart, 1978; microcomplement fixation, Maxson et al.
Preimplantation ploidy screening may enhance the clinical benefits of blastocyst transfer by further selecting genetically normal embryos," he continued.