25. Calico cats are female because
(A) a male inherits only one of the two X-linked genes controlling hair color
(B) the males die during embryonic development
(C) the Y chromosome has a gene blocking orange coloration
(D) only females can have Barr bodies
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統計: A(1), B(0), C(0), D(3), E(0) #2765588
統計: A(1), B(0), C(0), D(3), E(0) #2765588