Alternate-1 and alternate-2 orientations in interchange (reciprocal translocation) quadrivalents.
The dynamic properties of the spindle, and published numerical data, argue that the differentiation of alternate-1 and alternate-2 orientations of an interchange quadrivalent is real and meaningful, contra Boussy (1982).
Rickards
G K
GK
Department of Botany, Victoria University of Wellington, Wellington, New Zealand.