Which phase is the first stage of mitosis?

• A. Prophase
• B. Telophase
• C. Metaphase
• D. Anaphase

Answer: (A)

Verified step by step guidance

1. Recall the sequence of phases in mitosis, which are Prophase, Metaphase, Anaphase, and Telophase.
2. Understand that mitosis begins with the condensation of chromatin into visible chromosomes, which occurs during Prophase.
3. Recognize that during Prophase, the nuclear envelope starts to break down and the mitotic spindle begins to form.
4. Note that Metaphase, Anaphase, and Telophase occur after Prophase, each with distinct cellular events.
5. Conclude that since Prophase is the first phase where these key mitotic events start, it is the first stage of mitosis.