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

Previous problemNext problem

Struggling with Genetics?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

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

epistasis

pleiotropy

linkage

codominance

Previous problemNext problem

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 a specific genetic interaction.

Recognize that 'epistasis' is the term used to describe this interaction where one gene masks or modifies the effect of another gene.

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