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

Overview of interacting Genes

Genetics

3. Extensions to Mendelian Inheritance

Overview of interacting Genes

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Multiple Choice

A woman tests positive for the BRCA2 mutation. Which of the following is true?

She has an increased risk of developing breast and ovarian cancer compared to the general population.

The BRCA2 mutation only affects males and has no impact on female cancer risk.

The BRCA2 mutation is not inherited and cannot be passed to offspring.

She is guaranteed to develop breast cancer during her lifetime.

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Verified step by step guidance

Understand what the BRCA2 gene is: BRCA2 is a gene that produces a protein involved in repairing DNA damage, which helps maintain the stability of a cell's genetic material.

Recognize the impact of mutations in BRCA2: Mutations in this gene can impair DNA repair, leading to an increased risk of certain cancers, particularly breast and ovarian cancer in females.

Evaluate the inheritance pattern: BRCA2 mutations are inherited in an autosomal dominant manner, meaning the mutation can be passed from parent to child regardless of sex.

Analyze the risk implications: A positive test for a BRCA2 mutation indicates a higher risk of developing breast and ovarian cancer compared to the general population, but it does not guarantee cancer will develop.

Eliminate incorrect statements: The mutation affects both males and females, is inherited, and does not guarantee cancer, so the correct conclusion is that the woman has an increased risk of developing breast and ovarian cancer.