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

When does an ovum complete meiosis?

At birth

At fertilization

During puberty

During ovulation

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Verified step by step guidance

Understand the process of meiosis in the context of oogenesis, which is the development of an ovum (egg cell). Meiosis is a type of cell division that reduces the chromosome number by half, creating four haploid cells. In females, this process is part of the formation of the ovum.

Recognize that meiosis in females begins before birth. The primary oocytes start meiosis but are arrested in prophase I until puberty.

At puberty, hormonal changes trigger the continuation of meiosis. Each menstrual cycle, a few oocytes resume meiosis but are arrested again at metaphase II during ovulation.

Understand that the completion of meiosis occurs only if fertilization takes place. When a sperm penetrates the ovum, it triggers the completion of meiosis II, resulting in a mature ovum and the formation of a second polar body.

Conclude that the ovum completes meiosis at fertilization, which is the point when the egg and sperm nuclei fuse, allowing the ovum to become a zygote.