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Dictionary » S » Sister chromatids

Sister chromatids

Definition

noun, singular: sister chromatid

Two identical strands joined by a common centromere as a result of a chromosome that duplicated during the S phase of the cell cycle.


Supplement

Sister chromatids are separated during mitosis so that the two daughter cells would have identical sets of chromosomes.


Word origin: Greek khrōma, khrōmat-, color.

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


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Questions about Biology's term

... So during metaphase the two halves of a copied chromosome are both chromatids. At anaphase these separate and become two new chromosomes. Bivalent: A chromosome that has duplicated to form two sister chromatids still held together at the centromere. Tetrads: Group of four ...

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by Jesse2504
Tue Jun 23, 2009 6:25 am
 
Forum: General Discussion
Topic: Questions about Biology's term
Replies: 6
Views: 222

Question about chromosome replication before mitosis

... each chromosome makes a copy of itself, but the two copies (called sister chromatids) are glued together by proteins (I am guessing you are not into molecular biology ...

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by MrMistery
Sat Mar 07, 2009 5:40 pm
 
Forum: Genetics
Topic: Question about chromosome replication before mitosis
Replies: 1
Views: 771

Re: Difference between chromatid and chromatin?

... other. It this state, instead of calling them chromosomes, we call them chromatids. Thus, two sister chromatids are linked together at their specific DNA sequences called centromeres. Interesting, ...

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by kk
Sat Jan 17, 2009 1:55 pm
 
Forum: Cell Biology
Topic: Difference between chromatid and chromatin?
Replies: 3
Views: 3179

i need some help.

... find it anywhere with the internet 1.why are spindle fibers important 2.sister chromatids and centromeres make up what 3.what phase follows telophase (i think it's cytokinesis) ...

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by smilingMeFow
Wed Dec 17, 2008 4:19 am
 
Forum: Cell Biology
Topic: proteins found in the cell membrane.
Replies: 3
Views: 1363

Homework, read before you post

... find it anywhere with the internet 1.why are spindle fibers important 2.sister chromatids and centromeres make up what 3.what phase follows telophase (i think it's cytokinesis) ...

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by smilingMeFow
Tue Dec 16, 2008 11:45 pm
 
Forum:
Topic: Homework, read before you post
Replies: 9
Views: 10659
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