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

Which of the following could be a result of selective breeding in organisms with interacting genes?

Production of only homozygous individuals for all genes

Complete elimination of genetic variation in the population

Increased frequency of desirable traits due to selection for specific gene combinations

Random assortment of alleles without any change in trait frequency

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Verified step by step guidance

Understand the concept of selective breeding: it involves choosing parents with specific desirable traits to produce offspring with those traits, thereby influencing gene frequencies in the population.

Recognize that interacting genes (epistasis) means the effect of one gene depends on the presence of one or more 'modifier genes', so selecting for specific gene combinations can enhance certain traits.

Evaluate each option by considering the genetic consequences of selective breeding: for example, producing only homozygous individuals for all genes is unlikely because multiple genes and alleles segregate independently.

Consider that complete elimination of genetic variation is improbable because mutations and recombination continually introduce variation, and selective breeding usually reduces but does not eliminate variation.

Conclude that selective breeding can increase the frequency of desirable traits by selecting specific gene combinations, which aligns with the concept of increasing favorable allele combinations through non-random mating.