Genetics and Genetic Engineering

A Dictionary of Plant Sciences A Dictionary of Zoology A Dictionary of Biology The Columbia Encyclopedia,... Further reading

chiasma

A Dictionary of Plant Sciences | 1998 | | Copyright

chiasma (pl. chiasmata) In genetics, a cross-shaped structure forming the points of contact between non-sister chromatids of homologous chromosomes, first seen in the tetrads of the diplotene stage of meiotic prophase I. Chiasmata are thus the visible expression of crossing-over of genes. There are usually one or more chiasmata per chromosome per meiosis. See also BREAKAGE and REUNION.

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

MICHAEL ALLABY. "chiasma." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "chiasma." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O7-chiasma.html

MICHAEL ALLABY. "chiasma." A Dictionary of Plant Sciences. 1998. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-chiasma.html

Learn more about citation styles

chiasma

A Dictionary of Zoology | 1999 | | Copyright

chiasma (pl. chiasmata) In genetics, a cross-shaped structure that forms the points of contact between non-sister chromatids of homologous chromosomes first seen in the tetrads of the diplotene stage of meiotic prophase. Chiasmata are thus the visible expression of crossing-over of genes. There are usually one or more chiasmata per chromosome per meiosis. See also BREAKAGE AND REUNION.

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

MICHAEL ALLABY. "chiasma." A Dictionary of Zoology. 1999. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "chiasma." A Dictionary of Zoology. 1999. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O8-chiasma.html

MICHAEL ALLABY. "chiasma." A Dictionary of Zoology. 1999. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-chiasma.html

Learn more about citation styles

chiasma

A Dictionary of Biology | 2004 | Copyright

chiasma (pl. chiasmata)The point at which paired homologous chromosomes remain in contact as they begin to separate during the first prophase of meiosis, forming a cross shape. A number of chiasmata can usually be identified and at these points crossing over occurs.

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

"chiasma." A Dictionary of Biology. 2004. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

"chiasma." A Dictionary of Biology. 2004. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O6-chiasma.html

"chiasma." A Dictionary of Biology. 2004. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-chiasma.html

Learn more about citation styles

chiasma

The Columbia Encyclopedia, 6th ed. | 2011 | Copyright

chiasma : see crossing over .

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

"chiasma." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

"chiasma." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1E1-X-chiasma.html

"chiasma." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-X-chiasma.html

Learn more about citation styles

Free newspaper and magazine articles

	Chiasmata and chromosome breakages are related to crossing over in Drosophila... Magazine article from: Genome; 11/1/2006
	Zebrafish: chiasmata and interference.(genomics research)(Abstract also in... Magazine article from: Genome; 3/1/2006
	Chiasma Gets First Biotech Investment From InnoMed. Newspaper article from: BioWorld International; 4/9/2003