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

When the interaction of genes alters expected Mendelian genetic ratios, this phenomenon is called:

epistasis

linkage

codominance

pleiotropy

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Verified step by step guidance

Understand the question is asking about a genetic phenomenon where gene interactions change the expected Mendelian ratios.

Recall that Mendelian ratios are based on independent assortment and simple dominant-recessive relationships between alleles.

Identify that when one gene affects or masks the expression of another gene, altering these expected ratios, this is known as epistasis.

Differentiate epistasis from other options: linkage involves genes located close together on a chromosome, codominance involves both alleles being expressed equally, and pleiotropy refers to one gene affecting multiple traits.

Conclude that the correct term for gene interaction altering Mendelian ratios is epistasis.