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

Genetic Disorders

Anatomy & Physiology

29. Heredity

Genetic Disorders

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

If a genetic counselor was examining a pedigree chart and noticed an occurrence of a disease in every generation, the counselor would most likely assume that the disease was caused by:

A new reoccurring mutation.

An autosomal recessive disorder.

A chromosomal abnormality.

An autosomal dominant disorder.

Having an extra set of chromosomes.

Previous problemNext problem

Verified step by step guidance

Examine the pattern of inheritance described in the problem. The key observation is that the disease occurs in every generation, which suggests a dominant inheritance pattern.

Understand the difference between autosomal dominant and autosomal recessive disorders. Autosomal dominant disorders require only one copy of the mutated gene for the disease to manifest, while autosomal recessive disorders require two copies (one from each parent).

Eliminate options that do not fit the observed inheritance pattern. For example, a new reoccurring mutation would not consistently appear in every generation, and chromosomal abnormalities or having an extra set of chromosomes typically do not follow a predictable generational pattern.

Focus on the autosomal dominant disorder as the most likely explanation. This type of disorder is characterized by its presence in every generation because individuals with one copy of the mutated gene can pass it on to their offspring.

Conclude that the correct answer is 'An autosomal dominant disorder,' as it best explains the consistent occurrence of the disease in every generation of the pedigree chart.