Table of contents

1. Introduction to Genetics51m
2. Mendel's Laws of Inheritance3h 37m
3. Extensions to Mendelian Inheritance2h 41m
4. Genetic Mapping and Linkage2h 28m
5. Genetics of Bacteria and Viruses1h 21m
6. Chromosomal Variation1h 48m
7. DNA and Chromosome Structure56m
8. DNA Replication1h 10m
9. Mitosis and Meiosis1h 34m
10. Transcription1h 0m
11. Translation58m
12. Gene Regulation in Prokaryotes1h 19m
13. Gene Regulation in Eukaryotes44m
14. Genetic Control of Development44m
15. Genomes and Genomics1h 50m
16. Transposable Elements47m
17. Mutation, Repair, and Recombination1h 6m
18. Molecular Genetic Tools19m
- Genetic Cloning
  9m
- Methods for Analyzing DNA
  9m
19. Cancer Genetics29m
- Overview of Cancer
  21m
- Cancer Mutations
  7m
20. Quantitative Genetics1h 26m
21. Population Genetics50m
- Hardy Weinberg
  19m
- Allelic Frequency Changes
  31m
22. Evolutionary Genetics29m

3. Extensions to Mendelian Inheritance

Pleiotropy

Genetics

3. Extensions to Mendelian Inheritance

Pleiotropy

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Multiple Choice

Which of the following is NOT an example of a pleiotropic trait?

A single gene is expressed and has different functions in the brain, arm, and kidneys

A single gene can increase blood pressure, fire neurons, and keeps mucus in the lungs

Two genes are responsible for filtering urine in the kidneys

A single gene is expressed consistently throughout the life of an organism, but as the organism changes it has different effects

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Verified step by step guidance

Understand the concept of pleiotropy: Pleiotropy occurs when one gene influences multiple phenotypic traits. This means a single gene can have multiple effects on different parts of the body or different functions.

Analyze the first option: A single gene is expressed and has different functions in the brain, arm, and kidneys. This is an example of pleiotropy because one gene affects multiple organs.

Evaluate the second option: A single gene can increase blood pressure, fire neurons, and keep mucus in the lungs. This is also an example of pleiotropy as the gene affects various physiological processes.

Consider the third option: Two genes are responsible for filtering urine in the kidneys. This is not an example of pleiotropy because it involves two genes affecting a single function, rather than one gene affecting multiple traits.

Review the fourth option: A single gene is expressed consistently throughout the life of an organism, but as the organism changes, it has different effects. This is an example of pleiotropy because the gene has multiple effects over time.