What happens during Prophase I? You will need to think about what you learned during mitosis to fully answer the question. DNA coils into chromosomes

Crossing over

Nuclear Membrane disappears

Chromosomes line up in the middle of the cell

Crossing over

Explanation:

Prophase I is the first stage of meiosis I, it is the longest phase of meiosis. Crossing over (also known as recombination) can be defined as the process of exchange of genetic material between non-sister chromatids that occurs during Prophase I. Crossing over represents a critical source of genetic variation in offspring (the other one is the random orientation of the homologous chromosomes pairs). After crossing over, the resulting haploid (n) gametes aren't genetically identical to one another.

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correct answer is a. and d.