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 o p; 2ugr,2y 8 /m:vfs)tseligh.+ee(hb jk repuq+kyi;j:+ x3as 64 chromosomes, and a donkey, which has 62 chromosomes repe+e3i+kr y(e:j;kq .buhp+ j xroduce, a mule offspring is produced. Which are correct descriptions of mules?
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.
| 
