endoreduplication


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Related to endoreduplication: aneuploidy

endoreduplication

[¦en·dō·rē‚dü·plə′kā·shən]
(cell and molecular biology)
Appearance in mitotic cells of certain chromosomes or chromosome sets in the form of multiples.
(genetics)
Two to twelve or more rounds of replication and chromosome duplication without mitotic cell division, as in the production of polytene chromosomes.
References in periodicals archive ?
Tetraploidy and partial endoreduplication in a tripronuclear zygote obtained after intracytoplasmic sperm injection.
Spontaneous chromosome doubling was also not preferred because it may occur via somatic cell fusion, endoreduplication, endomitosis and possibly many other mechanisms (Jensen, 1974).
Hirst's study found that one or more of a handful of genes is likely responsible for the endoreduplication.
Since the BrdU labeling does not distinguish between endoreduplication and mitosis, however, we also used the cell-cycle marker phospho-histone-H3 to assess the presence of mitotic cells.
Cell expansion and endoreduplication show a large genetic variablilty in pericarp and contribute strongly to tomato fruit growth.
35,36) The process of endoreduplication results in multiple cycles of DNA replication associated with a failure of cell division, thus causing markedly enlarged polyploid nuclei with extensive chromosomal gains (Figure 4, B).
Cell line exhibited a high level of aneuploidy with modal chromosomal number between 43-45, with presence of poliploidy (55-102 <4n>, XXYY) and endoreduplication (end 45, X, -Y).
Inhibition of maize endosperm cell division and endoreduplication by exogenously applied abscisic acid.
lessonae chromosomes prior to meiosis, and is followed by premeiotic or occasionally by a prediplotene meiotic endoreduplication of the R.
Effects of p21(Cip1/Waf1) at both the G1/S and the G2/M cell cycle transitions: pRb is a critical determinant in blocking DNA replication and in preventing endoreduplication.
Endoreduplication, the process of a cell duplicating its DNA without subsequent cell division, is a phenomenon that occurs in the endosperm of cereals, which is the nutritious part of the seed.