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What is the status of Meiosis I and Meiosis II?

1) Meiosis I is arrested and Meiosis II is completed if fertilization occurs
2) Meiosis I is completed and Meiosis II is arrested if fertilization occurs
3) Both Meiosis I and Meiosis II are completed if fertilization occurs
4) Both Meiosis I and Meiosis II are arrested if fertilization occurs

1 Answer

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Final answer:

If fertilization occurs, Meiosis I is completed and Meiosis II is arrested. If fertilization does not occur, the cells will remain arrested at Meiosis II.

Step-by-step explanation:

The status of Meiosis I and Meiosis II depends on whether fertilization occurs. If fertilization occurs, Meiosis I is completed and Meiosis II is arrested. This means that the homologous chromosomes have separated in Meiosis I and the resulting cells now have half the number of sister chromatids as a diploid cell.

However, Meiosis II is paused and will only continue if fertilization occurs. If fertilization does not occur, the cells will remain arrested at Meiosis II.

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