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

29. Heredity

Overview of Human Genetics

Anatomy & Physiology

29. Heredity

Overview of Human Genetics

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Multiple Choice

Why does Duchenne Muscular Dystrophy (DMD) primarily affect boys, and what type of inheritance pattern does it follow?

DMD is an X-linked recessive disorder, affecting boys because they have only one X chromosome.

DMD is an autosomal dominant disorder, affecting boys due to random mutation.

DMD is an autosomal recessive disorder, affecting boys due to a higher mutation rate in males.

DMD is a Y-linked disorder, affecting boys because it is passed from father to son.

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Verified step by step guidance

Understand the basics of Duchenne Muscular Dystrophy (DMD): It is a genetic disorder characterized by progressive muscle degeneration and weakness.

Recognize the inheritance pattern: DMD is an X-linked recessive disorder. This means the gene causing the disorder is located on the X chromosome.

Consider the genetic makeup of males and females: Males have one X and one Y chromosome (XY), while females have two X chromosomes (XX).

Analyze why DMD primarily affects boys: Since males have only one X chromosome, a single recessive gene on the X chromosome will result in the disorder. Females would need two copies of the recessive gene to be affected, which is less likely.

Conclude the inheritance pattern: DMD follows an X-linked recessive pattern, explaining why it predominantly affects boys.