52.tIn vertebrate animals, spermatogenesis and oogenesis differ in that
(A)toogenesis ends at menopause, whereas spermatogenesis is finished before birth.
(B)toogenesis produces four haploid cells, whereas spermatogenesis produces only one sperm.
(C)toogenesis begins at the onset of sexual maturity, whereas spermatogenesis begns during embryonic development.
(D)tcytokinesis is unequal in oogenesis, whereas it is equal in spermatogenesis.
(E)tspermatogenesis is not completed until after fertilization occurs, but oogenesis is completed after ovulation.