Multiple Choice
In meiosis II, what is the primary purpose of the division?
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9. Mitosis and Meiosis
Meiosis
Multiple Choice
What key event occurs during metaphase I of meiosis?
A
Nuclear envelopes reform around each set of chromosomes and cytokinesis produces four haploid cells
B
Homologous chromosome pairs (tetrads) align at the metaphase plate with each homolog attached to spindle fibers from opposite poles
C
Sister chromatids separate and move to opposite poles of the cell
D
Homologous chromosomes synapse and crossing over occurs between non-sister chromatids
Verified step by step guidance1
Understand that meiosis consists of two sequential divisions: meiosis I and meiosis II, each with distinct stages.
Recall that metaphase I is a stage in meiosis I where homologous chromosomes (each consisting of two sister chromatids) behave in a specific way.
Identify that during metaphase I, homologous chromosome pairs, also called tetrads, align along the metaphase plate, which is the cell's equatorial plane.
Recognize that each homologous chromosome in the pair is attached to spindle fibers originating from opposite poles of the cell, ensuring proper segregation.
Note that this alignment and attachment are crucial for the subsequent separation of homologous chromosomes during anaphase I, reducing the chromosome number by half.
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