View source for Tetrad

A tetrad is another name for a [[Bivalent|bivalent]]&nbsp;<ref>Biology-online.org,
2014 
Bivalent - definition from Biology-Online.org. [online] 
Available at: http://www.biology-online.org/dictionary/Bivalent [Accessed Nov. 2014].</ref>&nbsp;It can be described as a pair of homologus [[Chromosomes|chromosomes]] or 4 [[Chromatids|chromatids]] and can be found during [[Meiosis prophase 1|Prophase 1]] of [[Meiosis|Meiosis]]&nbsp;<ref>Alberts, Johnson, Lewis, Raff, Roberts and Walter
(2008)
Molecular biology of the cell
5th Edition. New York. Garland Science, Taylor &amp; Francis group.</ref>.&nbsp; 

In Pachytene in prophase 1 the chromosomes become more visible and can easily be seen as the tetrad or bivalent <ref>Homepages.gac.edu,
2014
Chapter 11: Cell Cycles - Introduction. [online] 
Available at: http://homepages.gac.edu/~cellab/chpts/chpt11/intro11.html</ref>.&nbsp; 

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