Q.3
Which of the following occurs during meiosis but not during mitosis
during mitosis?
(1) Chromosomes align at the metaphase plate.
(2) Chromosomes condense.
(3) Chromosomes migrate to opposite poles.
(4) Synapsis.
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4
Answer:
The daughter cells produced by mitosis are identical, whereas the daughter cells produced by meiosis are different because crossing over has occurred. The events that occur in meiosis but not mitosis include homologous chromosomes pairing up, crossing over, and lining up along the metaphase plate in tetrads.
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1
Synapsis - option 4 is the correct answer.
Synapsis is a process in which the pairing or fusion of two chromosomes happen. It is only observed in meiosis. Chromosomes which which paired up after synapsis are known to be homologous chromosomes. After this process, synaptonemal complex is formed by bivalent chromosomes. Synapsis occurs at zygotene stage of the prophase 1 of meiosis 1.
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