4.原始生殖細胞(primordial germ cell)源自下列何者?
(A)生殖嵴(gonadal ridge)
(B)泌尿生殖竇(urogenital sinus)
(C)卵黃囊(yolk sac)
(D)中腎(mesonephros)
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統計: A(240), B(62), C(363), D(73), E(0) #1204975
統計: A(240), B(62), C(363), D(73), E(0) #1204975