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

Understanding Independent Assortment

Genetics

3. Extensions to Mendelian Inheritance

Understanding Independent Assortment

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Multiple Choice

Which of the following statements accurately describes both pleiotropy and polygenic inheritance?

Both involve a single gene affecting multiple traits.

Both involve the interaction of genes that can affect the expression of multiple phenotypes.

Both are examples of Mendel's law of independent assortment without exception.

Both involve multiple genes influencing a single trait.

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Verified step by step guidance

Step 1: Define pleiotropy and polygenic inheritance to understand their characteristics. Pleiotropy occurs when a single gene influences multiple phenotypic traits, while polygenic inheritance involves multiple genes contributing to a single trait.

Step 2: Analyze the first statement: 'Both involve a single gene affecting multiple traits.' This accurately describes pleiotropy but not polygenic inheritance, which involves multiple genes, so this statement is only partially correct.

Step 3: Examine the second statement: 'Both involve the interaction of genes that can affect the expression of multiple phenotypes.' Consider that pleiotropy involves one gene affecting multiple traits, and polygenic inheritance involves multiple genes affecting one trait. This statement suggests gene interactions affecting phenotypes, so evaluate if it correctly applies to both.

Step 4: Review the third statement: 'Both are examples of Mendel's law of independent assortment without exception.' Recall that Mendel's law applies to genes on different chromosomes or far apart on the same chromosome, but pleiotropy and polygenic inheritance often involve linked or interacting genes, so this statement is likely incorrect.

Step 5: Consider the fourth statement: 'Both involve multiple genes influencing a single trait.' This describes polygenic inheritance but not pleiotropy, which involves a single gene affecting multiple traits, so this statement is only partially correct.