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

7. DNA and Chromosome Structure

DNA Structure

Genetics

7. DNA and Chromosome Structure

DNA Structure

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Multiple Choice

Which of the following best explains the structural difference between DNA in chromatin and chromosome form?

Chromatin is found only in prokaryotes, while chromosomes are found only in eukaryotes.

Chromatin is double-stranded, but chromosomes are single-stranded.

Chromatin is less condensed, allowing for gene expression, while chromosomes are highly condensed for cell division.

Chromatin contains only RNA, whereas chromosomes contain only DNA.

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Verified step by step guidance

Step 1: Understand the definitions of chromatin and chromosomes. Chromatin is the complex of DNA and proteins found in the nucleus during interphase, while chromosomes are the highly condensed form of chromatin visible during cell division.

Step 2: Recognize that chromatin is less condensed, which allows the DNA to be accessible for processes like transcription and gene expression.

Step 3: Know that chromosomes represent the tightly packed form of chromatin, which helps in the efficient segregation of DNA during mitosis or meiosis.

Step 4: Eliminate incorrect options by recalling that both chromatin and chromosomes contain DNA (not RNA), and that both are found in eukaryotes (chromatin is not exclusive to prokaryotes). Also, DNA is double-stranded in both forms.

Step 5: Conclude that the key structural difference is the degree of condensation: chromatin is less condensed to allow gene expression, whereas chromosomes are highly condensed to facilitate cell division.