Multiple Choice
Which statement best explains the relationship between crossing over and genetic variation during meiosis?
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4. Genetic Mapping and Linkage
Crossing Over and Recombinants
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During which stage of meiosis does crossing over typically occur?
A
Metaphase II
B
Prophase I
C
Anaphase I
D
Telophase I
Verified step by step guidance1
Recall the stages of meiosis, which include Meiosis I and Meiosis II, each with their own sub-stages: Prophase, Metaphase, Anaphase, and Telophase.
Understand that crossing over is the process where homologous chromosomes exchange genetic material, increasing genetic diversity.
Identify that crossing over occurs when homologous chromosomes pair up and form structures called tetrads, allowing for the exchange of genetic segments.
Recognize that this pairing and exchange happen during Prophase I of Meiosis I, before the chromosomes are separated.
Conclude that crossing over does not occur during Metaphase II, Anaphase I, or Telophase I, but specifically during Prophase I.
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