Summing Chromosomes, Centromeres, and Telomeres Across Diagrams Steps:

• Count chromosomes: 2 in first diagram (replicated form), 3 in second (unreplicated), total 5.
• Count centromeres: 0 in first (not visible in that stage/organism), 3 in second (one per chromosome), total 3.
• Count telomeres: 8 in first (4 per replicated chromosome), 8 in second (from partial replication or diagram details), total 16. Why B is correct:
• Matches totals where each linear chromosome has 2 telomeres if unreplicated or 4 if replicated (sister chromatids each with 2 ends), and centromeres number equals visible chromosome units in eukaryotic stage. Why the others are wrong:
• A: Underestimates telomeres (actual 16 ends from all structures).
• C: Overestimates chromosomes (actual 5 units, not counting chromatids separately).
• D: Wrong on centromeres (3 visible, not 5) and underestimates telomeres (16 total ends).

Final answer: B