Multiple Choice
During meiosis, what happens to the chromosome number of a diploid cell by the end of meiosis II?
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9. Mitosis and Meiosis
Meiosis
Multiple Choice
During metaphase II of meiosis, which event occurs in each of the two haploid cells?
A
Nuclear envelopes reform around chromosomes and the spindle apparatus disassembles to produce two nuclei.
B
Individual chromosomes (each still consisting of two sister chromatids) align at the metaphase plate with kinetochores attached to opposite spindle poles.
C
Sister chromatids separate and move toward opposite poles as centromeres split.
D
Homologous chromosome pairs (tetrads) align at the metaphase plate prior to segregation.
Verified step by step guidance1
Recall the stages of meiosis, focusing on the differences between meiosis I and meiosis II, especially what happens during metaphase I and metaphase II.
Understand that meiosis I separates homologous chromosomes, resulting in two haploid cells, each with chromosomes still consisting of two sister chromatids.
Identify that metaphase II occurs in these haploid cells, where the chromosomes align at the metaphase plate, similar to mitosis but with half the chromosome number.
Recognize that during metaphase II, individual chromosomes (each with two sister chromatids) line up at the metaphase plate, and kinetochores attach to spindle fibers from opposite poles.
Note that sister chromatids will separate during anaphase II, not metaphase II, and that nuclear envelopes do not reform until telophase II.
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