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1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart2h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

3. Energy & Cell Processes

Interphase

Anatomy & Physiology

3. Energy & Cell Processes

Interphase

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Multiple Choice

If a human somatic cell is just about to divide, it has __________ chromatids.

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Understand that a human somatic cell is a typical body cell, which is diploid, meaning it has two sets of chromosomes.

Recall that humans have 23 pairs of chromosomes, totaling 46 chromosomes in a somatic cell.

Before a cell divides, during the S phase of the cell cycle, each chromosome is replicated. This means each chromosome now consists of two sister chromatids.

Since there are 46 chromosomes and each is replicated into two chromatids, the total number of chromatids in a cell just before division is 46 multiplied by 2.

Calculate the total number of chromatids: \( 46 \times 2 = 92 \) chromatids.