NEET Biology question
Refer to the given paragraph where a few words/phrases have been italicised.
Meiosis is also called **reductional** division as the number of chromosomes **remains same** after division. Synapsis of **homologous** chromosomes takes place during pachytene stage of prophase I. Crossing over between **sister** chromatids of **non-homologous** chromosomes usually takes place during diplotene stage. Centromeres do not divide during **anaphase II** but they do so in **anaphase I**. **Similar** chromosomes move towards opposite poles both in anaphase I and anaphase II.
Select the correct option regarding this.
Solution
Checking each italicised term against meiosis: "reductional" is correct (meiosis does reduce chromosome number) — but "remains same" is wrong, since the chromosome number is in fact reduced to half, not retained. "Synapsis of homologous chromosomes" is correctly placed at pachytene (pairing actually begins at zygotene
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