Which of the following statements about breeding is incorrect? (A) By inbreeding, purelines cann...

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Which of the following statements about breeding is incorrect?
(A) By inbreeding, purelines cannot be evolved.
(B) Continued inbreeding, especially close inbreeding reduces fertility and productivity.
(C) Cross-breeding allows desirable qualities of two different breeds to be combined.
(D) Inbreeding exposes harmful recessive genes that are eliminated by selection.
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