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

Understanding Independent Assortment

Genetics

3. Extensions to Mendelian Inheritance

Understanding Independent Assortment

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Multiple Choice

Which statement explains why the recombination frequency between two genes is always less than 50%?

Because independent assortment only occurs in prokaryotes, not eukaryotes.

Because genes that are on the same chromosome and close together are less likely to be separated by crossing over, limiting the maximum recombination frequency to less than 50%.

Because recombination frequency is determined solely by the number of chromosomes, not gene location.

Because recombination events always occur between every pair of genes during meiosis.

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Verified step by step guidance

Understand that recombination frequency measures how often two genes are separated by crossing over during meiosis, which reflects their physical distance on a chromosome.

Recall that genes located on the same chromosome are said to be linked, and the closer they are, the less likely a crossover event will occur between them.

Recognize that a recombination frequency of 50% corresponds to genes assorting independently, which happens when genes are either on different chromosomes or far apart on the same chromosome.

Note that recombination frequency cannot exceed 50% because beyond this point, genes behave as if they are unlinked due to multiple crossover events canceling each other out.

Conclude that the maximum recombination frequency is less than 50% for genes that are physically close on the same chromosome, explaining why recombination frequency is always less than 50% for linked genes.