What does sister chromatid exchange mean?
Definitions for sister chromatid exchange
sis·ter chro·matid ex·change
This dictionary definitions page includes all the possible meanings, example usage and translations of the word sister chromatid exchange.
Wikidata
Sister chromatid exchange
Sister chromatid exchange is the exchange of genetic material between two identical sister chromatids. It was first discovered by using the Giemsa staining method on one chromatid belonging to the sister chromatid complex before anaphase in mitosis. The staining revealed that few segments were passed to the sister chromatid which were not dyed. The Giemsa staining was able to stain due to the presence of bromodeoxyuridine analogous base which was introduced to the desired chromatid. The reason for the is not known but it is required and used as a mutagenic testing of many products. Four to five sister chromatid exchange per chromosome pair, per mitosis is in the normal distribution, 14-100 exchanges is not normal and presents a danger to the organism. SCE is elevated in pathologies including Bloom syndrome, having recombination rates ~10-100 times above normal, depending on cell type. Frequent SCEs may also be related to formation of tumors. Sister chromatid exchange has also been observed more frequently in B51 Behçet's disease.
U.S. National Library of Medicine
Sister Chromatid Exchange
An exchange of segments between the sister chromatids of a chromosome, either between the sister chromatids of a meiotic tetrad or between the sister chromatids of a duplicated somatic chromosome. Its frequency is increased by ultraviolet and ionizing radiation and other mutagenic agents and is particularly high in BLOOM SYNDROME.
Numerology
Chaldean Numerology
The numerical value of sister chromatid exchange in Chaldean Numerology is: 9
Pythagorean Numerology
The numerical value of sister chromatid exchange in Pythagorean Numerology is: 5
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"sister chromatid exchange." Definitions.net. STANDS4 LLC, 2024. Web. 27 Apr. 2024. <https://www.definitions.net/definition/sister+chromatid+exchange>.
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