From The School of Biomedical Sciences Wiki
In Pachytene in prophase 1 the chromosomes become more visible and can easily be seen as the tetrad or bivalent .
- ↑ Biology-online.org, 2014 Bivalent - definition from Biology-Online.org. [online] Available at: http://www.biology-online.org/dictionary/Bivalent [Accessed Nov. 2014].
- ↑ Alberts, Johnson, Lewis, Raff, Roberts and Walter (2008) Molecular biology of the cell 5th Edition. New York. Garland Science, Taylor & Francis group.
- ↑ Homepages.gac.edu, 2014 Chapter 11: Cell Cycles - Introduction. [online] Available at: http://homepages.gac.edu/~cellab/chpts/chpt11/intro11.html