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| 1. |
Describe the following synapses bivalent chrimata |
| Answer» Synapsis\xa0(also called syndesis) is the pairing of two homologous chromosomes that occurs during meiosis. It allows matching-up of homologous pairs prior to their segregation, and possible chromosomal crossover between them.\xa0Synapsis\xa0takes place during prophase I of meiosis. Chiasmata\xa0is the point of contact, the physical link, between two (non-sister) chromatids belonging to homologous chromosomes. The\xa0chiasmata\xa0become visible during the diplotene stage of prophase I of meiosis, but the actual "crossing-overs" of genetic material are thought to occur during the previous pachytene stage. | |