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

6. Chromosomal Variation

Chromosomal Rearrangements: Overview

Genetics

6. Chromosomal Variation

Chromosomal Rearrangements: Overview

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Multiple Choice

The following picture depicts which of the following changes in chromosome structure?

Inversion

Duplication

Deletion

Translocation

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Verified step by step guidance

Step 1: Understand the definitions of the chromosome structure changes listed: Duplication is when a segment of the chromosome is copied and inserted, Deletion is when a segment is lost, Translocation is when a segment moves to a different chromosome, and Inversion is when a segment of a chromosome breaks off, flips around, and reattaches in the reverse orientation.

Step 2: Identify the key feature of an inversion: the order of genes or segments within the chromosome is reversed compared to the original sequence, but no genetic material is lost or gained.

Step 3: Examine the picture carefully to see if a segment of the chromosome appears reversed in orientation relative to the rest of the chromosome, without any missing or extra segments.

Step 4: Compare this observation with the definitions: if the segment is reversed but intact, it matches the description of an inversion rather than duplication, deletion, or translocation.

Step 5: Conclude that the chromosome structure change depicted is an inversion because the segment is flipped in orientation within the same chromosome.