本题目来源于试卷: Continuity and Change D.4 Cell & Nuclear Division，类别为 IB生物学
[单选题]
Which row correctly st )auho fo77pd -wqot*a0 9kmq2ates the number of alleles of a single geneveb,+jh1 tg9; vkgv( l which would be present in the nucleus of a cell as a result of ;9gv(,jv gvek+ lh tb1each process?
A. Mitosis I is Two;Meiosis II is Two;Fertilisation is Two
B. Mitosis I is One;Meiosis II is One;Fertilisation is Two
C. Mitosis I is Two;Meiosis II is One;Fertilisation is Two
D. Mitosis I is Two;Meiosis II is One;Fertilisation is One
参考答案: C
本题详细解析:
Choice C is correct because meiosis halves the number of chromosomes, mitosis maintains the diploid number and fertilisation restores the diploid number. Choice A is incorrect because meiosis separates pairs of alleles and produces nuclei with one allele for each gene. Choice B is incorrect because mitosis produces genetically identical cells that have two alleles for each gene. Choice D is incorrect because, in fertilisation, two gametes fuse, and each gamete has one allele for each gene.
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