Chiasmata are the sites of crossing over
Several chiasmata appear in this photograph taken in the course of meiosis in a grasshopper testis.
[
G. H. Jones and F. C. H. Franklin, “Meiotic Crossin
g-
over: Obligation and Interference,”
Cell
126:2 (28 July 2006), 24
6-
248. © Elsevier
.]
