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Biology · CELL CYCLE AND CELL DIVISION

हिन्दी

Consider the following statements regarding Prophase I of Meiosis: (A) Chromosomes become gradually visible under the light microscope during leptotene. (B) Synapsis of homologous chromosomes results in the formation of a bivalent or tetrad in zygotene. (C) Crossing over is completed by the end of pachytene, leaving chromosomes linked at chiasmata. (D) Terminalisation of chiasmata marks the completion of diplotene. Which of the above statements are correct?

  1. (A), (B) and (C) only
  2. (A) and (D) only
  3. (B), (C) and (D) only
  4. (A), (B), (C) and (D)

Correct answer · Option 1

(A), (B) and (C) only

Explanation

Statements (A), (B), and (C) are correct. Statement (D) is incorrect because terminalisation of chiasmata is the hallmark of diakinesis, not diplotene.
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