36. In vertebrate animals, spermatogenesis and oogenesis differ, in that
(A) oogenesis begins at the onset of sexual maturity, whereas spermatogenesis happens in embryonic
development.
(B) oogenesis produces four haploid cells, whereas spermatogenesis produces only one functional
spermatozoon.
(C) cytokinesis is unequal in oogenesis, whereas it is equal in spermatogenesis.
(D) spermatogenesis is not completed until after fertilization occurs, but oogenesis is completed by the
time a girl is born.
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