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Multiple Choice
How does interphase I of meiosis differ from interphase II of meiosis?
A
Both interphase I and interphase II include DNA replication.
B
Neither interphase I nor interphase II includes DNA replication.
C
Interphase II includes DNA replication, while interphase I does not.
D
Interphase I includes DNA replication, while interphase II does not.
Verified step by step guidance
1
Understand the context of meiosis: Meiosis is a type of cell division that reduces the chromosome number by half, creating four haploid cells. It consists of two stages: Meiosis I and Meiosis II.
Review the phases of meiosis: Each stage of meiosis includes an interphase, where the cell prepares for division. Interphase is crucial for DNA replication and cell growth.
Focus on Interphase I: During Interphase I, the cell undergoes a phase called the S phase (Synthesis phase), where DNA replication occurs. This is essential for the cell to have a complete set of chromosomes before entering Meiosis I.
Examine Interphase II: After Meiosis I, the cell enters a brief interphase before Meiosis II. However, this interphase does not include an S phase, meaning no DNA replication occurs. The cell directly proceeds to Meiosis II with the already replicated chromosomes from Interphase I.
Conclude the differences: The key difference is that Interphase I includes DNA replication to prepare for the first division, while Interphase II does not include DNA replication, as the chromosomes are already duplicated from the previous interphase.