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 genomic variation refers to different number of gene copies between individuals and populations?

Single nucleotide polymorphisms

Copy number variants

CA Repeats

Transposons

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Verified step by step guidance

Understand the concept of genomic variation: Genomic variation refers to differences in the DNA sequence among individuals. These variations can occur in different forms, such as single nucleotide polymorphisms (SNPs), copy number variants (CNVs), and others.

Define single nucleotide polymorphisms (SNPs): SNPs are variations at a single position in a DNA sequence among individuals. They are the most common type of genetic variation and usually do not involve changes in the number of gene copies.

Define copy number variants (CNVs): CNVs are a type of structural variation where the number of copies of a particular gene or genomic region varies between individuals. This can result in duplications or deletions of large sections of DNA, affecting gene dosage and potentially leading to phenotypic differences.

Define CA repeats: CA repeats, also known as microsatellites, are short, repetitive sequences of DNA. They are highly polymorphic and can vary in length between individuals, but they do not typically involve changes in the number of gene copies.

Define transposons: Transposons, or 'jumping genes,' are DNA sequences that can change their position within the genome. While they can cause mutations and genomic rearrangements, they are not primarily associated with variations in gene copy number.