Multiple Choice
The decline of MPF (Maturation Promoting Factor) activity at the end of mitosis is due to:
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11. Cell Division
Introduction to Cell Division
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The maturation of a primary oocyte to a secondary oocyte is called ______.
A
fertilization
B
meiosis II
C
meiosis I
D
mitosis
Verified step by step guidance1
Understand the context: The question is about the process of oocyte maturation, which involves cell division and the transition from a primary oocyte to a secondary oocyte.
Recall the stages of oogenesis: Oogenesis is the process of egg cell development. A primary oocyte undergoes meiosis to form a secondary oocyte and a polar body.
Identify the type of cell division: The transition from a primary oocyte to a secondary oocyte occurs during meiosis I, which reduces the chromosome number from diploid (2n) to haploid (n).
Differentiate between meiosis I and meiosis II: Meiosis I is the reductional division that separates homologous chromosomes, while meiosis II separates sister chromatids. The maturation to a secondary oocyte happens after meiosis I.
Conclude that the correct answer is meiosis I, as this is the specific stage where the primary oocyte matures into a secondary oocyte.
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