When does crossing over occur?
Understand the Problem
The question is asking about the process of crossing over in sexually reproducing organisms, specifically when it occurs and its advantages. This relates to genetic processes during reproduction.
Answer
45: A. during the formation of gametes; 46: B. Crossing over creates new gene combinations.
The final answer is: 45. A: during the formation of gametes. 46. B: Crossing over creates new combinations of genes to pass on to daughter cells.
Answer for screen readers
The final answer is: 45. A: during the formation of gametes. 46. B: Crossing over creates new combinations of genes to pass on to daughter cells.
More Information
Crossing over increases genetic diversity by creating new combinations of alleles, which is essential for evolution and adaptation.
Tips
A common mistake is to confuse the timing of crossing over with fertilization or replication. Remember that it occurs during meiosis.
Sources
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