Multiple Choice
Which process that occurs during meiosis contributes to a gamete having unique genetic material?
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12. Meiosis
Genetic Variation During Meiosis
Multiple Choice
Which of the following is true of crossing over during meiosis?
A
It occurs during prophase I and increases genetic variation.
B
It occurs during anaphase I and results in identical daughter cells.
C
It occurs during metaphase II and reduces genetic variation.
D
It occurs during telophase II and has no effect on genetic variation.
Verified step by step guidance1
Understand the process of meiosis: Meiosis is a type of cell division that reduces the chromosome number by half, creating four haploid cells. It consists of two stages: meiosis I and meiosis II.
Identify the phases of meiosis I: Meiosis I includes prophase I, metaphase I, anaphase I, and telophase I. Crossing over occurs during prophase I.
Explain crossing over: Crossing over is the exchange of genetic material between homologous chromosomes during prophase I of meiosis. This process increases genetic variation by producing new combinations of alleles.
Consider the effects of crossing over: By increasing genetic variation, crossing over contributes to the diversity of traits in a population, which is important for evolution and adaptation.
Review the options given: The correct statement is that crossing over occurs during prophase I and increases genetic variation. The other options incorrectly describe the timing and effects of crossing over.
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