BIO NMDCAT Chromosomes

nmdcat.online July 4, 2026

7. During the metaphase stage of mitosis, a fully duplicated chromosome structurally contains

A. A single chromatid with two centromeres

B. Two identical sister chromatids joined at the centromere

✓

C. Four non-sister chromatids separated completely

D. Three independent strands of euchromatin

📝 Explanation

Following replication in the S-phase, each chromosome at metaphase is composed of two identical copies called sister chromatids, which remain physically connected at the primary constriction site (centromere).

📖 Additional Information

A single chromatid with two centromeres
Two identical sister chromatids joined at the centromere
Four non-sister chromatids separated completely
Three independent strands of euchromatin

Following replication in the S-phase, each chromosome at metaphase is composed of two identical copies called sister chromatids, which remain physically connected at the primary constriction site (centromere).

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