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A
B
C
D
Fig. 61. Cross sections of seminiferous tubules in (A) infertile and fertile (B) triploid zebrafi sh.
For expansion of abbreviations, see Fig. 4.3. Inset in (A): magnifi cation of second meiotic
division; note the concomitant presence of secondary spermatocytes and spermatids. (F) and
G). Synapsis in triploid spermatocytes (D) is strongly disorganized as compared to that in
wild type (C). Irregular synapsis is indicated by arrow heads (from Feitsma et al., 2007, with
permission by the Genetic Society of America)
 
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