19. If deer is crossed with sheep, the embryos will form but cease development and spontaneously abort. This is an example of
(A) a prezygotic mechanism.
(B)hybrid inviability.
(C)hybrid sterility.
(D)hybrid breakdown.
(E) spermatic behavior.

答案：登入後查看
統計： A(3), B(26), C(7), D(3), E(0) #2345007

詳解 (共 1 筆)

#4579208

hybrid inviability雜種無生存力

hybrid sterility 雜交不育

hybrid breakdown 雜種衰敗，指子代（F2等等）會漸趨無法存活

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