Read the following statements regarding Prophase-I of meiosis: (A) Bivalent chromosomes clearly appear as tetrads in the pachytene stage. (B) Crossing over is an enzyme-mediated process involving the enzyme recombinase. (C) Diakinesis represents the transition to metaphase I and is marked by the dissolution of the synaptonemal complex. (D) Synapsis occurs between non-homologous chromosomes during zygotene. How many o

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Statement (A) is correct. Although bivalents are formed during zygotene, they become clearly visible as tetrads in the pachytene stage. Statement (B) is correct. Crossing over is an enzyme-mediated process and the enzyme involved is recombinase. Statement (C) is incorrect. Diakinesis represents the transition to metaphase I, but it is marked by the terminalisation of chiasmata. The dissolution of the synaptonemal complex occurs during the diplotene stage. Statement (D) is incorrect. Synapsis is the pairing of homol