Multiple Choice
What is the main goal of meiosis in sexually reproducing organisms?
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9. Mitosis and Meiosis
Meiosis
Multiple Choice
In meiosis, what is the specific purpose of meiosis II?
A
To replicate DNA so that each chromosome consists of two sister chromatids before cell division.
B
To separate sister chromatids, producing haploid cells with unduplicated chromosomes (similar to mitosis).
C
To promote crossing over between homologous chromosomes to generate new allele combinations.
D
To separate homologous chromosome pairs and reduce the chromosome number from diploid to haploid.
Verified step by step guidance1
Understand that meiosis consists of two sequential divisions: meiosis I and meiosis II, each with distinct purposes.
Recall that meiosis I separates homologous chromosome pairs, reducing the chromosome number from diploid (2n) to haploid (n).
Recognize that DNA replication occurs before meiosis I, so each chromosome consists of two sister chromatids at the start of meiosis II.
Identify that the specific purpose of meiosis II is to separate these sister chromatids, similar to what happens in mitosis, resulting in haploid cells with unduplicated chromosomes.
Note that meiosis II does not involve DNA replication or crossing over; its main role is to ensure each gamete receives a single copy of each chromosome.
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