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Related to polyploids: haploid


Having one or more extra sets of chromosomes: a polyploid species; a polyploid cell.
An organism with more than two sets of chromosomes.

pol′y·ploi′dy n.


(Biology) (of cells, organisms, etc) having more than twice the basic (haploid) number of chromosomes
(Biology) an individual or cell of this type
ˌpolyˈploidal, ˌpolyˈploidic adj
ˈpolyˌploidy n


(ˈpɒl iˌplɔɪd)
1. having a chromosome number that is more than double the basic or haploid number.
2. a polyploid cell or organism.
pol`y•ploi′dic, adj.
pol′y•ploi`dy, n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.polyploid - (genetics) an organism or cell having more than twice the haploid number of chromosomes
organism, being - a living thing that has (or can develop) the ability to act or function independently
genetic science, genetics - the branch of biology that studies heredity and variation in organisms
Adj.1.polyploid - of a cell or organism having more than twice the haploid number of chromosomes; "a polyploid cell"; "a polyploid species"
genetic science, genetics - the branch of biology that studies heredity and variation in organisms
diploid - of a cell or organism having two sets of chromosomes or twice the haploid number; "diploid somatic cells"
haploid, haploidic, monoploid - of a cell or organism having a single set of chromosomes
References in periodicals archive ?
Deciphering the origins of apomictic polyploids in the Cheilanthes yavapensis complex (Pteridaceae).
loss of self-incompatibility in polyploids is not understood (Comai,
Discussing in turn the genomics of hybrids and of polyploids, and mechanisms for novelty in the two, they consider such topics as transcriptome profiling of Drosophila inter-specific hybrids, developments in the study of the genomics and heterosis in hybrid rice, chromosomal and gene expression changes in Brassica allopolyploids, polyploid species-specific chromosomal polymorphisms in wheat, seed development in interploidy hybrids, and genetic and epigenetic mechanisms for polyploidy and hybridity.
Very important is to say that also has been found an agglutination of chromosomes, polyploids, extended prophases, and in the 24-hour treatment disorder of spiralisation and vakuolarisation of chromosomes (Table 4) (Figures 4,5,6,7 and 8).
Weeds, polyploids, parthenogenesis and the geographical and ecological distribution of all-female species of Cnemidophorus.
Chromosome counts in nearly all cyprinid polyploids occur in multiples or combinations of the most common karyotype (48-50) and tetraploids (96, 98 or 100) and hexaploids (148-150) have arisen through hybridisation (Dowling & Secor 1997).
Such abnormalities are typical of polyploids and have widely been reported in other Poaceae forage grasses such as Paspalum (FREITAS et al.
The role of genetic and genomic attributes in the success of polyploids.
Exchanges were rarely detected and less frequency of polyploids was also recorded in the exposed groups when compared to the respective control groups.
However, our diversification rate analyses only examined recent polyploids.
Polyploidy has had an enormous influence on the evolution of grasses, and it is estimated that all grasses are polyploids (paleo or neopolyploids; Levy & Feldman 2002).
It induced chromosomal aberrations, aneuploids, autosomal univalents, univalents of the sex chromosomes and polyploids.