本题目来源于试卷: Unity and Diversity A.8 Evolution and Speciation，类别为 IB生物学
[单选题]
When a horse, which has 0:iye68pk ckj(h hy4g64 cr,ihfjzkv31v9 u+k 6;bn .k tchromosomes, and a donkey, which has 62 chromosomes reproduce, a mule offspring is produced. Which are correct descriptions of mules?
i9 bfv ;,thr1kkzu jc+36 vkn.
I. Mules frequently produce offspring with other mules.
II. Cells in mules cannot undergo meiosis but can undergo mitosis.
III. Mule gametes have 63 chromosomes.
A. I only
B. II and III only
C. II only
D. I and II only
参考答案: C
本题详细解析:
Choice C is correct because only statement II is correct. Mules have 63 chromosomes, so gametes cannot be produced, as 63 chromosomes cannot be equally divided into daughter cells. Statement I is incorrect, as mules cannot reproduce with other mules. Statement III is incorrect because the somatic cells, not the gametes of mules, have 63 chromosomes.
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