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

1. Introduction to Genetics

Modern Genetics

Genetics

1. Introduction to Genetics

Modern Genetics

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Struggling with Genetics?

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Multiple Choice

Which of the following best describes research findings on the genetics of obesity?

Genetic factors play no role in the development of obesity; it is entirely determined by lifestyle.

Obesity is caused by a single gene mutation in all affected individuals.

Obesity is influenced by multiple genes, each contributing a small effect, as well as environmental factors.

Obesity is inherited only through mitochondrial DNA.

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Verified step by step guidance

Step 1: Understand that obesity is a complex trait influenced by both genetic and environmental factors, rather than being caused by a single gene or solely by lifestyle.

Step 2: Recognize that multiple genes, often called polygenic factors, each contribute a small effect to the overall risk of developing obesity. This means no single gene mutation is responsible for obesity in all individuals.

Step 3: Consider the role of environmental factors such as diet, physical activity, and lifestyle, which interact with genetic predispositions to influence obesity risk.

Step 4: Note that mitochondrial DNA inheritance is maternal and typically affects traits related to energy metabolism, but obesity is not inherited exclusively through mitochondrial DNA.

Step 5: Conclude that the best description of the genetics of obesity is that it is influenced by multiple genes with small effects combined with environmental factors, reflecting a multifactorial inheritance pattern.