Question:

Among the following statements, which one is unique about meiosis?

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Meiosis is reductional ($2n \to n$), producing haploid gametes with half the maternal chromosome number; Mitosis is equational ($2n \to 2n$).
  • It involves spindle apparatus
  • It is genetically controlled
  • It involves cytokinesis
  • Daughter cell contains half of the chromosome numbers of the mother cells
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The Correct Option is D

Solution and Explanation

Step 1: Understanding the Concept:
Meiosis is a specialized reductional nuclear division occurring in sexually reproducing eukaryotes.

Step 2: Detailed Explanation:

Both mitosis and meiosis involve spindle microtubule formation, genetic regulation, and cytokinesis.
The defining, unique attribute of meiosis is chromosome reduction: a diploid parental germ cell ($2n$) undergoes one round of DNA replication followed by two successive nuclear divisions (Meiosis I and Meiosis II), producing four haploid daughter cells ($n$) each carrying exactly half the chromosome complement of the mother cell.

Step 3: Final Answer:

Therefore, reduction of daughter cell chromosome number by half is unique to meiosis.
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