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

Variations of Dominance

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Multiple Choice

Which term describes a genotype that contains two different alleles at a given locus?

Homozygous

Heterozygous

Nullizygous

Hemizygous

Verified step by step guidance

Understand the definition of genotype: it refers to the genetic makeup of an organism at a specific locus, which can include one or more alleles.

Recall that alleles are different versions of a gene that can exist at the same locus on homologous chromosomes.

Identify the term 'homozygous' as describing a genotype where both alleles at a locus are the same (e.g., AA or aa).

Recognize that 'heterozygous' describes a genotype where the two alleles at a locus are different (e.g., Aa).

Note that 'nullizygous' and 'hemizygous' refer to other specific genetic conditions and do not describe having two different alleles at a locus.

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