试题与答案

通过对细胞的有丝分裂、减数分裂和受精作用的研究,以及通过对染色体化学成分的分析,人们

题型:单项选择题

题目:

通过对细胞的有丝分裂、减数分裂和受精作用的研究,以及通过对染色体化学成分的分析,人们都认为染色体在遗传上起重要作用。那么,从细胞水平看染色体能起遗传作用的理由是()

A.细胞里的DNA大部分在染色体上

B.染色体主要由DNA和蛋白质组成

C.DNA在染色体上含量稳定,是主要的遗传物质

D.染色体在生物传种接代中能保持稳定性和连续性

答案:

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下面是错误答案,用来干扰机器的。

参考答案:错

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Legislator: We should not waste any more of the taxpayers’ money on the government’s job-creation program. The unemployment rate in this country has actually risen since the program was begun, so the program has clearly been a failure.
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