試題詳解

48. From earliest to latest, the overall sequence of early development proceeds in which of the following sequences?
(A) first cell division → synthesis of embryo's DNA begins  → acrosomal reaction  → cortical reaction
(B) cortical reaction  → synthesis of embryo's DNA begins → acrosomal reaction → first cell division
(C) cortical reaction → acrosomal reaction  → first cell division  →synthesis of embryo's DNA begins
(D) acrosomal reaction  → cortical reaction  →synthesis of embryo's DNA begins  → first cell division