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Which of the following events occurs during prophase I but does not occur during prophase of mitosis?

A. Chromatin condenses into chromosomes
B. Crossing over
C. Nuclear envelope dissolves
D. Centrioles appear in animal cells


Sagot :

Final answer:

In meiosis prophase I, crossing over occurs, a process unique to this phase and absent in prophase of mitosis.


Explanation:

Prophase I of meiosis involves crossing over, which is a unique event that does not occur during prophase of mitosis. During prophase I, homologous chromosomes pair up and exchange genetic material, increasing genetic diversity. This process does not happen in prophase of mitosis, making it a key difference between the two phases.


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