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

A chromosome with two centromeres is called what?

Bichromosome

Bivalent

Dicentric

Acentric

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Verified step by step guidance

Understand the structure of a chromosome: A chromosome typically has a single centromere, which is the region where the two sister chromatids are held together and where the spindle fibers attach during cell division.

Learn the terminology: A chromosome with two centromeres is referred to as 'dicentric'. The prefix 'di-' means two, indicating the presence of two centromeres.

Differentiate between similar terms: A 'bichromosome' is not a standard term in genetics. 'Bivalent' refers to a pair of homologous chromosomes that are aligned together during meiosis, not related to centromere count. 'Acentric' refers to a chromosome or fragment that lacks a centromere.

Recognize the implications: Dicentric chromosomes can lead to problems during cell division because the two centromeres may be pulled to opposite poles, potentially causing chromosome breakage.

Apply this knowledge: When identifying chromosome structures, use the correct terminology to describe the number of centromeres, as this can affect genetic stability and cell division outcomes.