12. When a single-gene mutation can have phenotypic effects at multiple stages of development, it is
(A)pleiotropic.
(B)incompletely dominant.
(C)recessive.
(D)causing a disease.
(E)codominant.
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統計: A(25), B(1), C(1), D(5), E(4) #2344905
統計: A(25), B(1), C(1), D(5), E(4) #2344905