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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Three pairs of genes with two alleles each (A₁ and A₂,B₁ and B₂, and C₁ and C₂) control the height of a plant. The alleles of these genes have an additive relationship: Each copy of alleles A₁,B₁, and C₁ contributes 6 cm to plant height, and each copy of alleles A₂,B₂, and C₂ contributes 3 cm.Identify all possible genotypes for plants with an expected height of 33 cm.

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What is a random sample, and why can a random sample be used to represent a population?

Open Question

Why is heritability an important phenomenon in plant and animal agriculture?

Open Question

Three pairs of genes with two alleles each (A₁ and A₂,B₁ and B₂, and C₁ and C₂) control the height of a plant. The alleles of these genes have an additive relationship: Each copy of alleles A₁,B₁, and C₁ contributes 6 cm to plant height, and each copy of alleles A₂,B₂, and C₂ contributes 3 cm.Identify the number of different phenotypes (expected plant heights) that are possible with these three genes.

Open Question

Three pairs of genes with two alleles each (A₁ and A₂,B₁ and B₂, and C₁ and C₂) control the height of a plant. The alleles of these genes have an additive relationship: Each copy of alleles A₁,B₁, and C₁ contributes 6 cm to plant height, and each copy of alleles A₂,B₂, and C₂ contributes 3 cm.Identify the number of different genotypes that are possible with these three genes.

Open Question

Three pairs of genes with two alleles each (A₁ and A₂,B₁ and B₂, and C₁ and C₂) control the height of a plant. The alleles of these genes have an additive relationship: Each copy of alleles A₁,B₁, and C₁ contributes 6 cm to plant height, and each copy of alleles A₂,B₂, and C₂ contributes 3 cm.What is the expected height of a plant with the genotype A₁A₂B₂B₂C₁C₂?

Open Question

Three pairs of genes with two alleles each (A₁ and A₂,B₁ and B₂, and C₁ and C₂) control the height of a plant. The alleles of these genes have an additive relationship: Each copy of alleles A₁,B₁, and C₁ contributes 6 cm to plant height, and each copy of alleles A₂,B₂, and C₂ contributes 3 cm.What height is expected in the F₁ progeny of a cross between A₁A₁B₁B₁C₁C₁ and A₂A₂B₂B₂C₂C₂.

Open Question

Three pairs of genes with two alleles each (A₁ and A₂, B₁ and B₂, and C₁ and C₂) control the height of a plant. The alleles of these genes have an additive relationship: Each copy of alleles A₁, B₁, and C₁ contributes 6 cm to plant height, and each copy of alleles A₂, B₂, and C₂ contributes 3 cm.

What are the expected heights of plants with each of the homozygous genotypes A₁A₁B₁B₁C₁C₁ and A₂A₂B₂B₂C₂C₂.

Open Question

In selective breeding experiments, it is frequently observed that the strains respond to artificial selection for many generations, with the selected phenotype changing in the desired direction. Often, however, the response to artificial selection reaches a plateau after many generations, and the phenotype no longer changes as it did in past generations.What is the genetic explanation for the plateau phenomenon?

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