chiasmata
Noun
The word is derived from chiasma
Synonyms
Examples
At this stage, non-sister chromatids may cross-over at points called chiasmata (plural; singular chiasma ).
Because the chromosomes cannot be distinguished in the synaptonemal complex, the actual act of crossing over is not perceivable through the microscope, and chiasmata are not visible until the next stage.
Sites of crossing over entangle together, effectively overlapping, making chiasmata clearly visible.
The chiasmata remain on the chromosomes until they are severed at the transition to anaphase I. In mammalian and human fetal oogenesis all developing oocytes develop to this stage and are arrested before birth.
At the sites where exchange happens, chiasmata form.