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

Understanding Independent Assortment

Genetics

3. Extensions to Mendelian Inheritance

Understanding Independent Assortment

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Multiple Choice

The crossover percentage between two different genes is:

always 50% regardless of their location

unrelated to their position on the chromosome

higher for genes that are closely linked

proportional to the physical distance between them on a chromosome

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Verified step by step guidance

Understand that crossover percentage, also known as recombination frequency, measures how often two genes are separated during meiosis due to crossing over.

Recall that genes located close together on the same chromosome tend to be inherited together because the chance of a crossover event occurring between them is low.

Recognize that as the physical distance between two genes increases, the probability of a crossover event occurring between them also increases, leading to a higher recombination frequency.

Know that a recombination frequency of 50% indicates that genes assort independently, which usually means they are either on different chromosomes or very far apart on the same chromosome.

Conclude that the crossover percentage is proportional to the physical distance between genes on a chromosome, making it a useful tool for constructing genetic linkage maps.