Dictionary » C » Chromatid

Chromatid

Definition

noun, plural: chromatids

Either of the two strands joined together by a single centromere, formed from the duplication of the chromosome during the early stages of cell division and then separate to become individual chromosome during the late stages of cell division.


Supplement

The term chromatid was proposed by Clarence Erwin McClung (1900) for each of the four threads making up a chromosome-pair during meiosis. It was later used also for mitosis.

Chromatids may be sister or non-sister chromatids.

When chromatids separate and move toward opposite poles of the cell, they are now referred to as daughter chromosomes.


Word origin: Greek khrōma, khrōmat-, color.

Related terms: sister chromatid, non-sister chromatid.

Compare: homologous chromosome.
See also: centromere, meiosis, mitosis.


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Results from our forum


Re:

... then we could draw a simple analogy between segregation of homologous chromosomes in anaphase I and separation of recombinant and non-recombinant chromatid in anaphase II. Being as it is, we could still compare the separation of chromatids with another shuffling of the dealt cards.

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by leeroykincaid
Tue Apr 23, 2013 8:40 am
 
Forum: Cell Biology
Topic: independent assortment
Replies: 2
Views: 4397

Genetics with Mitosis and Meiosis

... during S-phase. So, after S-phase, each chromosome consists of 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 with only one chromatid will be just a line, not an X. The ...

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by wildfunguy
Sun Feb 03, 2013 11:45 pm
 
Forum: Genetics
Topic: Genetics with Mitosis and Meiosis
Replies: 2
Views: 7695

Re: aneuploidy and polyploidy

... species) and autopolyploidy (within the same species). This process comes as a result of non-disjunction or failure of the cell to divide after chromatid separation. I don't really think the chromosomes "balance out" as there can be an irregular number (3N) and this doesn't balance...and ...

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by carmodyf
Thu Oct 11, 2012 4:36 am
 
Forum: Cell Biology
Topic: aneuploidy and polyploidy
Replies: 2
Views: 4476

Re: Genetics Homeworkkk!!! PLEASE HELP

... chromosomes for Metaphase of Mitosis and one possibility for Metaphase of Meiosis 1. Shade in the paternal chromosomes and label the appropriate chromatid with the correct gene symbol for the Glowing Green Blood Degree 3 allele it carries. Be sure to label each allele and each chromosome. Do ...

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by david23
Fri Sep 14, 2012 11:03 pm
 
Forum: Genetics
Topic: Genetics Homeworkkk!!! PLEASE HELP
Replies: 5
Views: 4051

Genetics Homeworkkk!!! PLEASE HELP

... chromosomes for Metaphase of Mitosis and one possibility for Metaphase of Meiosis 1. Shade in the paternal chromosomes and label the appropriate chromatid with the correct gene symbol for the Glowing Green Blood Degree 3 allele it carries. Be sure to label each allele and each chromosome. Do ...

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by els09011
Thu Sep 13, 2012 1:09 am
 
Forum: Genetics
Topic: Genetics Homeworkkk!!! PLEASE HELP
Replies: 5
Views: 4051
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