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简答题 GRE

2012-10-16

Strangely enough，thereare no albino horses，(i) _____there are occasionallyhorses that are white with pink skin．It appears thatthe gene that(ii) _albinism is(iii) _______to horses，and affected embryosspontaneously abort．

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答案解析

C，D，H．
If you have trouble，work backward．The fact that embryos spontaneously abort indicates that the gene is lethal(choice H）．The other choices should become clear from that point．

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