THE CELL
CELL COMMUNICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A spindle forms in the mitotic cell
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Twice as many chromosomes in the meiotic cell
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Paired homologous chromosomes in the meiotic cell
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Half as many chromosomes in the meiotic cell
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Detailed explanation-1: -Pairing of homologous chromosomes does not occur in the prophase of mitosis, whereas homologous chromosomes pair up in prophase I of meiosis I. In the prophase of mitosis, recombination, and crossing over do not take place. In prophase, I of meiosis I, recombination, crossing over, and synapsis takes place.
Detailed explanation-2: -Meiosis I includes crossing over or recombination of genetic material between chromosome pairs, while meiosis II does not. This occurs in meiosis I in a long and complicated prophase I, split into five sub-phases. The equatorial plane in meiosis II is rotated 90° from the alignment of the equatorial plane in meiosis I.
Detailed explanation-3: -So, the correct option is ‘Formation of tetrad in a meiotic cell’.
Detailed explanation-4: -Mitosis involves the division of body cells, while meiosis involves the division of sex cells. The division of a cell occurs once in mitosis but twice in meiosis. Two daughter cells are produced after mitosis and cytoplasmic division, while four daughter cells are produced after meiosis.