Scelta multipla
Non-disjunction means that chromosomes:
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12. Meiosis
Genetic Variation During Meiosis
Scelta multipla
Crossing over occurs during __________.
A
cytokinesis
B
metaphase I
C
prophase II
D
metaphase II
E
prophase I
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Understand that crossing over is a process where homologous chromosomes exchange genetic material, leading to genetic variation in gametes.
Recall that meiosis is divided into two main stages: Meiosis I and Meiosis II, each with its own phases: prophase, metaphase, anaphase, and telophase.
Focus on Meiosis I, where homologous chromosomes pair up and exchange segments. This is crucial for genetic diversity.
Identify that crossing over specifically occurs during Prophase I of Meiosis I, when homologous chromosomes form tetrads and exchange genetic material.
Recognize that the other options (cytokinesis, metaphase I, prophase II, metaphase II) do not involve the process of crossing over.
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