Table of contents

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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

What role does nondisjunction play in the formation of a fertile allopolyploid hybrid?

It ensures that only parental chromosomes are inherited, maintaining species integrity.

It prevents the fusion of gametes from different species.

It leads to the loss of chromosomes, resulting in sterile hybrids.

It causes chromosome doubling, allowing homologous chromosomes from different species to pair during meiosis.

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Verified step by step guidance

Understand that nondisjunction is the failure of chromosome pairs to separate properly during cell division, which can lead to changes in chromosome number.

Recognize that in the context of allopolyploid hybrids, nondisjunction can cause chromosome doubling, meaning the hybrid ends up with two complete sets of chromosomes from each parent species.

Know that this chromosome doubling is crucial because it allows homologous chromosomes from each species to find a pairing partner during meiosis, which is necessary for fertility.

Realize that without nondisjunction and the resulting chromosome doubling, the hybrid would have unpaired chromosomes during meiosis, leading to sterility due to improper segregation.

Conclude that nondisjunction facilitates the formation of fertile allopolyploid hybrids by enabling proper chromosome pairing and segregation during meiosis.