At the end of interphase, how many chromatids does a human somatic cell contain?

• A. 92
• B. 184
• C. 46
• D. 23

Answer: (A)

Verified step by step guidance

1. Recall that a human somatic cell is diploid and contains 46 chromosomes in total (23 pairs).
2. Understand that during interphase, specifically the S phase, DNA replication occurs, so each chromosome is duplicated to form two sister chromatids.
3. Since each chromosome now consists of two chromatids, multiply the number of chromosomes by 2 to find the total number of chromatids.
4. Express this mathematically as: \(\text{Number of chromatids} = 46 \times 2\).
5. Calculate the product to find the total chromatids present at the end of interphase.