Dictionary » S » Sister chromatid

Sister chromatid


noun, plural: sister chromatids

Any of the two chromatids joined together by a common centromere.


A sister chromatid may also be said as 'one-half' of the duplicated chromosome. It is one of the two identical copies of DNA making up a chromosome.

Word origin: Greek khrōma, khrōmat-, color.

Related terms: sister chromatid exchange.

Compare: non-sister chromatid.
See also: centromere, chromatid.

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Genetics with Mitosis and Meiosis

... two strands. When the DNA is coiled, the two strands are referred to as sister chromatids. The sister chromatids are what make chromosomes X-shaped. However, a chromosome ...

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by wildfunguy
Sun Feb 03, 2013 11:45 pm
Forum: Genetics
Topic: Genetics with Mitosis and Meiosis
Replies: 2
Views: 9245

Re: DNA - mitosis - chromosome - chromatid

... There are now two copies of each strand, each of which forms one chromatid in the chromosome. Now keep in mind, the sister chromatids are two separate DNA molecules, but they are connected by the centromere ...

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by Jordanw21
Sun Nov 07, 2010 2:40 pm
Forum: Genetics
Topic: DNA - mitosis - chromosome - chromatid
Replies: 4
Views: 5969

Cell division

... are the S (duplicating DNA) and M (splitting of the duplicated DNA). Sister chromatids is not the same thing as homologous chromosome. Sister chromatids is seen in mitosis, ...

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by kolean
Wed Mar 24, 2010 10:59 pm
Forum: Cell Biology
Topic: Cell division
Replies: 1
Views: 2350

Meiosis = extreme confusion. Please help!

... don't get too confused by the terms "chromosome" and "chromatid". Chromosome can refer to both 1.) the X shape you see during ... by the centromere. So, "chromatid" really means "sister copy of a chromosome", and when the two copies are joined together ...

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by mamoru
Tue Mar 02, 2010 2:27 pm
Forum: Cell Biology
Topic: Meiosis = extreme confusion. Please help!
Replies: 10
Views: 59944

Re: Ethidium

... assay in mouse BALB/c3T3 cells (AA, 1-2 mM, 72 h treatment). Sister chromatid exchange was also weakly but significantly induced by AA (AA, 1-2.5 mM, 24 h treatment) ...

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by zami'87.
Thu Dec 17, 2009 12:42 pm
Forum: Molecular Biology
Topic: Ethidium
Replies: 5
Views: 4456
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