42. In humans, oogenesis is completed
(A)prior to ovulation.
(B)after ovulation, but before the sperm enters the oocyte.
(C)once the sperm penetrates the oocyte.
(D) after the nuclei of the sperm and egg fuse.
(E)during embryonic development.

答案：登入後查看
統計： A(6), B(11), C(104), D(23), E(8) #938837

詳解 (共 1 筆)

#4666757
在精子進入前，卵子停留在metaphas...
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