Multiple Choice
At what stage of meiosis does crossing over between homologous chromosomes occur?
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9. Mitosis and Meiosis
Meiosis
Multiple Choice
In meiosis, what is true about the four daughter cells produced at the end of meiosis II?
A
They are haploid and genetically distinct from one another due to crossing over and independent assortment.
B
They are haploid and genetically identical to one another because meiosis produces clones.
C
They are diploid and genetically distinct because homologous chromosomes do not separate in meiosis.
D
They are diploid and genetically identical to the original parent cell.
Verified step by step guidance1
Recall that meiosis consists of two rounds of division: meiosis I and meiosis II, which ultimately reduce the chromosome number by half.
Understand that during meiosis I, homologous chromosomes separate, resulting in daughter cells that are haploid (contain one set of chromosomes).
Recognize that crossing over occurs during prophase I, where homologous chromosomes exchange genetic material, creating new combinations of alleles.
Note that independent assortment during metaphase I leads to random distribution of maternal and paternal chromosomes into daughter cells, increasing genetic diversity.
Conclude that after meiosis II, the four daughter cells are haploid and genetically distinct from each other due to the combined effects of crossing over and independent assortment.
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