After the centromeres separate during mitosis the chromatids now called ___ move toward opposite poles of the spindle-

Options

A. Centrosomes
B. Kinetochores
C. Half spindles
D. Daughter chromosomes

Answer

**Step-by-Step Solution:**

1. **Understanding Mitosis**: Mitosis is a process of cell division that results in two genetically identical daughter cells. It involves several stages, including prophase, metaphase, anaphase, and telophase.

2. **Centromere Function**: The centromere is the region of a chromosome where the two sister chromatids are joined together. During mitosis, the centromeres play a crucial role in the separation of chromatids.

3. **Separation of Centromeres**: At the beginning of anaphase, the centromeres split, allowing the sister chromatids to separate. This is a critical step in ensuring that each daughter cell receives an identical set of chromosomes.

4. **Terminology Change**: Once the centromeres have separated, the sister chromatids are no longer referred to as chromatids. Instead, they are now called **daughter chromosomes**.

5. **Movement Toward Opposite Poles**: After the separation, these daughter chromosomes move toward opposite poles of the spindle apparatus, ensuring that each new cell will have the correct number of chromosomes.

6. **Final Answer**: Therefore, the answer to the question is that after the centromeres separate during mitosis, the chromatids are now called **daughter chromosomes**.

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