Question

Which process helps make meiotic cells genetically different and occurs during prophase I, but not during prophase II?​

Answer 1

Answer:

Crossing over is the process in which the homologus chromosomes exchange their chromatids and exchange the genetic material and produce variation

it is the process  that make meiotic cells genetically different and occurs during prophase I, but not during prophase II

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Explanation:

Answer 2

Answer:

The correct answer is crossing over.

Explanation:

Crossing over maintains genetic diversity within a population of an organism, allows the various genetic combination to be transferred from parents to their offspring.  

Crossing over of chromatids pair occurs during prophase-I, it is the very first phase of meiosis-1. In this phase, the 3rd stage is pachytene in which genetic recombination occurs because of the formation of recombinant nodules.

The first phase of meiosis II is prophase II in which the nuclear envelope breaks and the formation of the spindle apparatus occurs.

Thus, the correct answer is crossing over.