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

7. DNA and Chromosome Structure

DNA Structure

Genetics

7. DNA and Chromosome Structure

DNA Structure

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Multiple Choice

Which aspect of DNA allows scientists to distinguish between individuals?

The presence of deoxyribose sugar in the backbone

The uniform pairing of adenine with thymine and guanine with cytosine

The double helix structure common to all DNA

The unique sequence of nucleotide bases in non-coding regions

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Verified step by step guidance

Understand that DNA is composed of a sugar-phosphate backbone and nitrogenous bases (adenine, thymine, guanine, cytosine).

Recognize that the sugar (deoxyribose) and the double helix structure are common to all DNA molecules and do not vary between individuals.

Focus on the sequence of nucleotide bases, which can vary greatly between individuals, especially in non-coding regions of DNA.

Learn that these unique sequences in non-coding regions serve as genetic markers that allow scientists to distinguish one individual from another.

Conclude that it is the unique sequence of nucleotide bases, not the sugar, base pairing rules, or overall structure, that enables individual identification.