Fig. 1. Representative metaphase 1 meiotic configurations in PMCs from Frondoso (a-b).
(a) 21 bivalents, (b) 19 bivalents + 1 ring quadrivalent, (c) 19 bivalents + 1 chain quadrivalent, (d)
18 bivalents + 1 chain quadrivalent + 1 univalent (quadrivalents indicated by arrows).