SAT Subject Biology Practice Question 27: Answer and Explanation

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Question: 27

1. At which stage of meiosis do cells from a sperm cell precursor contain a haploid set of chromosomes, each consisting of two sister chromatids?

A. Anaphase I
B. Metaphase I
C. Prophase II
D. Anaphase II
E. Telophase II

Correct Answer: C


The first stage of meiosis divides the diploid set of chromosomes into two haploid sets. Homologous chromosomes separate in anaphase I, and at the beginning (prophase) of stage 2, each cell contains a haploid set. However, the chromosomes are still replicated and still consist of joined sister chromatids. These separate in anaphase II.

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