Crossing over occurs at the four-strand stage when two homologous chromosomes, each consisting of a pair of sister chromatids, are paired. Each crossover involves just two of the four strands and generates two recombinant strands.
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Answer:
The plasma membrane is responsible for maintaing B: homeostasis
Answer: I think Negative?
Explanation:
Adenine to thymine and cytosine to guanine are the base pairings during DNA replication.
