in chromosome of Maize (Zea)
The photo shows two pairs
of synapsed chromatids, with five chiasmata between various pairs of the
upper and lower pairs. Note that chiasmata occur only between
one member of the top pair and one of the bottom pair,
never within pairs.
Figure ©2002 by Griffiths et al.; all text material ©2013 by
Steven M. Carr