Meiosis prophase 1
Prophase 1
Prophase 1 of Meiosis is the first stage of meiosis and is defined by five different phases; Leptotene, Zygotene, Pachytene, Diplotene and Diakinesis[1] (in that order). Prophase 1 is essentially the crossing over and recombination of genetic material between non sister chromatids[2] - this results in the genetically unidentical, haploid daughter chromatid cells.
Leptotene
Leptotene is the first of fives stages of Prophase 1 and consists of the condensing of the already replicated chromosomes. The appearance of the chromosomes at this stage of Prophase 1 is likened to 'a string with beads'[3]4
Zygotene
Pachytene
Diplotene
Diakinesis
References
- ↑ Biology online, 26/10/2011, "Prophase 1", Available at: http://www.biology-online.org/dictionary/Prophase_i
- ↑ Biology online, 27/09/2011, “Meiosis” available at: http://www.biology-online.org/dictionary/Meiosis
- ↑ Dr. William H. Heidcamp, from 1995 onwards, "Cell Cycles Introduction", available at: http://homepages.gac.edu/~cellab/chpts/chpt11/intro11.html