Multiple Choice
In animals, which type of cells undergo meiosis to produce gametes?
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9. Mitosis and Meiosis
Meiosis
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During prophase I of meiosis, which key event occurs that increases genetic variation?
A
The nuclear envelope reforms and chromosomes decondense
B
DNA replication occurs to produce identical sister chromatids
C
Sister chromatids separate and move to opposite poles of the cell
D
Homologous chromosomes pair (synapsis) and exchange segments by crossing over at chiasmata
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