Multiple Choice
What type of cells does meiosis produce?
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12. Meiosis
Introduction to Meiosis
Multiple Choice
What is crossing over and during which phase of meiosis does it occur?
A
Crossing over is the separation of sister chromatids, and it occurs during anaphase II.
B
Crossing over is the formation of the spindle apparatus, and it occurs during telophase I.
C
Crossing over is the pairing of homologous chromosomes, and it occurs during metaphase I.
D
Crossing over is the exchange of genetic material between homologous chromosomes, and it occurs during prophase I.
Verified step by step guidance1
Understand the concept of crossing over: Crossing over is a process where homologous chromosomes exchange genetic material. This is crucial for genetic diversity in sexually reproducing organisms.
Identify the correct phase of meiosis: Meiosis is divided into two main stages, Meiosis I and Meiosis II, each with its own sub-phases: prophase, metaphase, anaphase, and telophase.
Focus on Prophase I: During Prophase I of Meiosis I, homologous chromosomes pair up in a process called synapsis, forming structures known as tetrads.
Recognize the occurrence of crossing over: It is during this pairing in Prophase I that crossing over occurs, allowing for the exchange of genetic material between non-sister chromatids of homologous chromosomes.
Conclude with the significance: This exchange of genetic material during crossing over increases genetic variation in the resulting gametes, which is a key advantage of sexual reproduction.
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