Table of contents

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 Heart3h 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

27. The Reproductive System

Meiosis

Anatomy & Physiology

27. The Reproductive System

Meiosis

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Multiple Choice

What is the primary difference between metaphase I and metaphase II in meiosis?

In metaphase I, the nuclear envelope is intact, while in metaphase II, it is broken down.

In metaphase I, sister chromatids line up at the equatorial plate, while in metaphase II, homologous chromosomes line up.

In metaphase I, chromosomes are not yet condensed, while in metaphase II, they are fully condensed.

In metaphase I, homologous chromosomes line up at the equatorial plate, while in metaphase II, sister chromatids line up.

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Verified step by step guidance

Understand the stages of meiosis: Meiosis consists of two consecutive divisions, meiosis I and meiosis II, each with its own phases: prophase, metaphase, anaphase, and telophase.

Identify the key events in metaphase I: During metaphase I, homologous chromosomes (each consisting of two sister chromatids) align at the equatorial plate. This alignment is crucial for the separation of homologous chromosomes in the subsequent anaphase I.

Identify the key events in metaphase II: In metaphase II, the chromosomes, which are now composed of sister chromatids, align at the equatorial plate. This is similar to mitosis, where sister chromatids are separated.

Compare the alignment in metaphase I and metaphase II: The primary difference is that in metaphase I, homologous chromosomes line up at the equatorial plate, whereas in metaphase II, it is the sister chromatids that line up.

Conclude the comparison: The correct distinction is that metaphase I involves the alignment of homologous chromosomes, while metaphase II involves the alignment of sister chromatids, reflecting the different purposes of each meiotic division.