The sub-phase of prophase-I in which synapsis begins between homologous chromosomes is:
Correct answer: B. Zygotene
- A. Leptotene
- B. Zygotene
- C. Diplotene
- D. Pachytene
Explanation
Zygotene is the sub-phase of Prophase-I where synapsis begins, homologous chromosomes start pairing to form bivalents.Option B is the correct anwer.Leptotene is when chromosomes start to condense and become visible as thin threads.Diplotene is the stage where synapsis ends and homologous chromosomes start separating.pachytene is the stage of meiosis I where homologous chromosomes are tightly paired and crossing over happens.
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About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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