Which one of the following is correct sequence of stages of prophase 1 of meiosis
Correct answer: C. Leptotene zygotene pachytene diplotene diakinesis
- A. Diakinesis diplotene pachytene leptotene zygotene
- B. Zygotene leptotene pachytene diplotene diakinesis
- C. Leptotene zygotene pachytene diplotene diakinesis
- D. Pachytene leptotene diplotene zygotene diakinesis
Explanation
The five substages of prophase I occur in the order leptotene, zygotene, pachytene, diplotene and diakinesis. Pairing begins in zygotene, crossing over occurs during pachytene, and chromosomes become maximally condensed by diakinesis. Students may choose option b because zygotene is associated with pairing, but leptotene comes first.
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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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