Multiple Choice
Which of the following occurs during the process called crossing over in meiosis?
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12. Meiosis
Genetic Variation During Meiosis
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Why is crossing over during meiosis important for genetic variation?
A
It allows for the exchange of genetic material between homologous chromosomes, increasing genetic diversity.
B
It prevents mutations from occurring during cell division.
C
It ensures that each gamete receives an identical set of chromosomes.
D
It reduces the number of chromosomes in the resulting gametes.
Verified step by step guidance1
Understand that meiosis is a type of cell division that reduces the chromosome number by half, creating four haploid cells, each genetically distinct from the parent cell.
Recognize that crossing over occurs during prophase I of meiosis, where homologous chromosomes pair up and exchange segments of genetic material.
Acknowledge that this exchange of genetic material between homologous chromosomes results in new combinations of alleles, contributing to genetic diversity in the offspring.
Realize that genetic variation is crucial for evolution and adaptation, as it provides a population with a wider range of traits that may be beneficial in changing environments.
Conclude that crossing over is important because it increases genetic diversity, which is essential for the survival and evolution of species.
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