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Related to polyploid: autopolyploid, autopolyploidy


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 ?
This year's review of genetics contains 23 studies of such aspects as witnessing genome evolution: experimental reconstruction of endosymbiotic and horizontal gene transfer, transcriptional regulation in Archaea: from individual genes to global regulatory networks, genetic and structural analysis of RRNPP intercellular peptide signaling of Gram-positive bacteria, combining traditional mutagenesis with new high-throughput sequencing and genome editing to reveal hidden variation in polyploid wheat, and the generation and evolution of neural cell types and circuits: insights from the Drosophila visual system.
Polyploid organisms should not be mistaken with organisms genetically modified by transgenics because the former only have more chromosomes than the most common number found in nature (Piferrer et al.
On the other hand, tens of thousands of now-living species are polyploid and contain multiple copies of their genome.
Genome duplication has occurred numerous times in the species, and a recent study suggests 46 independent origins of tetraploid Galax, more than for any other polyploid (Servick et al.
In Brazil, polyploid genotypes have already been obtained in several forage species and hybrids such as: Brachiaria brizantha, Brachiaria decumbens, Brachiaria ruziziensis and hybrids between B.
From the results of previous studies, we consider a polyploid pattern in 10 or fewer cells to be a negative FISH result, as such alterations are common in reactive conditions.
Genome plasticity a key factor in the success of polyploid wheat under domestication.
Either aneuploid or polyploid karyotype was observed which displayed chromosome instability in the human lung adenocarcinoma cell line OM.
The high mutation rate coupled with the polyploid nature of the mitochondrial genome gives rise to an important feature of mitochondrial genetics, namely homoplasmy and heteroplasmy.
It is interesting to notice that these chromosome similarities observed among species, strengthen the hypothesis about Vitis origin as an ancient secondary polyploid (paleoallohexaploid) firstly proposed by Patel and Olmo (1955).
Leyenda: A new polyploid of Blechnum occidentale (Blechnaceae-Polypodiopsida) for the northwest of Argentina