SAT Subject Biology Practice Question 3: Answer and Explanation

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Question: 3

3. A cell normally contains 54 chromosomes. During which phases of mitosis does the cell contain 108 chromosomes?

I. Anaphase

II. Metaphase

III. Prophase

IV. Telophase

A. I and IV
B. II and III
C. II and IV
D. I, II, and III
E. I, II, and IV

Correct Answer: A


The sister chromatids making up each of the 54 chromosomes separate in anaphase and move to opposite poles of the cell in telophase. In these two phases, the cell contains 108 distinct chromosomes.

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