Table of contents

1. Overview of Cell Biology2h 49m
2. Chemical Components of Cells1h 14m
3. Energy1h 33m
4. DNA, Chromosomes, and Genomes2h 31m
5. DNA to RNA to Protein2h 31m
6. Proteins1h 36m
7. Gene Expression1h 42m
8. Membrane Structure1h 4m
- The Lipid Bilayer
  38m
- Membrane Proteins
  25m
9. Transport Across Membranes1h 52m
10. Anerobic Respiration1h 5m
11. Aerobic Respiration1h 11m
12. Photosynthesis52m
13. Intracellular Protein Transport2h 18m
14. Cell Signaling1h 28m
15. Cytoskeleton and Cell Movement1h 39m
16. Cell Division3h 5m
17. Meiosis and Sexual Reproduction50m
18. Cell Junctions and Tissues48m
19. Stem Cells13m
- Stem Cells
  13m
20. Cancer44m
21. The Immune System1h 6m
22. Techniques in Cell Biology1h 41m

4. DNA, Chromosomes, and Genomes

Human Genetic Variation

Cell Biology

4. DNA, Chromosomes, and Genomes

Human Genetic Variation

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Multiple Choice

Which of the following is true regarding genomic genetic variations?

Genomic size is proportional to genomic complexity

Mobile genetic elements make up a very small proportion of the human genome

Sequence variations between one individual and another occurs once every 1000 nucleotides

CA repeats are extremely stable genetic elements found in the human genome

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Verified step by step guidance

Understand that genomic genetic variations refer to differences in the DNA sequence among individuals.

Consider the statement about genomic size and complexity: Genomic size is not necessarily proportional to genomic complexity. For example, some organisms with large genomes are not more complex than those with smaller genomes.

Evaluate the statement about mobile genetic elements: Mobile genetic elements, such as transposons, actually make up a significant portion of the human genome, not a very small proportion.

Analyze the statement about sequence variations: Sequence variations, or single nucleotide polymorphisms (SNPs), occur approximately once every 1000 nucleotides in the human genome, which is a widely accepted estimate.

Examine the statement about CA repeats: CA repeats, also known as microsatellites, are not extremely stable; they are prone to mutations and variations, which makes them useful in genetic studies.