Same chapter3 marksDifficulty: Medium
Distinguish between cytokinesis in a plant cell and in an animal cell.
Cell Cycle and Cell Division
3 marksDifficulty: Medium
Name the stages of meiosis I and state what happens in prophase I.
Original Khojo Papers practice question — not from a past board paper.
Answer
Prophase I, metaphase I, anaphase I and telophase I. Prophase I has five substages: leptotene, in which the chromosomes condense; zygotene, in which homologous chromosomes pair by synapsis; pachytene, in which crossing over occurs; diplotene, in which the homologues separate but remain joined at chiasmata; and diakinesis, in which the chiasmata terminalise.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Crossing over during pachytene is the main source of genetic recombination.
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