讲解一下这道题---**Question 3** **Question Stem:** 3. 下图表示某细胞正在进行减数分裂。下列有关叙述中,正确的是 ( ) (The figure below shows a cell undergoing meiosis. Which of the following statements is correct?) **Diagram Description:** * Type: Biological diagram illustrating chromosomes during meiosis. * Main Elements: * The diagram is enclosed within a circle, representing a cell. * Two pairs of homologous chromosomes are depicted. * The upper pair consists of two homologous chromosomes labeled A and B, which are paired together as a tetrad. Chromosome A has two sister chromatids labeled 1 and 2. Chromosome B has two sister chromatids labeled 3 and 4. * The lower pair consists of two homologous chromosomes labeled C and D, which are paired together as a tetrad. Chromosome C has two sister chromatids labeled 5 and 6. Chromosome D has two sister chromatids labeled 7 and 8. * The chromosomes appear condensed and aligned, typical of Prophase I or Metaphase I of meiosis. **Options:** A. 该细胞中有 4 个四分体 (This cell has 4 tetrads) B. 1 和 2, 1 和 3, 1 和 4 之间均有可能发生互换 (Crossing over may occur between 1 and 2, 1 and 3, 1 and 4) C. 由于同源染色体是形态、大小相同的染色体, 所以 A 与 B、5 与 6 都为同源染色体 (Since homologous chromosomes are chromosomes identical in shape and size, A and B, and 5 and 6 are homologous chromosomes) D. 全部细胞分裂完成后, 产生的子细胞中有 2 条染色体 (After the entire cell division is completed, the daughter cells will have 2 chromosomes)