Fig. 2From: Asynapsis and unreduced gamete formation in a Trifolium interspecific hybridMale meiotic products of hybrid-33. a. a tetrad and triad in the same microscope field; b. a dyad; c. a monad; d. aceto-carmine stained pollen grains. Sterile pollen grains are small, wrinkled and unstained. Scale bar in b is 10 μm and applies also to a and c. Scale bar in d is 100 μmBack to article page