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

8. DNA Replication

Overview of DNA Replication

Genetics

8. DNA Replication

Overview of DNA Replication

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Multiple Choice

During which phase of the cell cycle is the DNA of the cell's chromosomes copied?

M phase

S phase

G2 phase

G1 phase

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Verified step by step guidance

Understand the phases of the cell cycle: G1 phase (cell growth), S phase (DNA synthesis), G2 phase (preparation for mitosis), and M phase (mitosis or cell division).

Recall that DNA replication occurs to ensure each daughter cell receives an identical set of chromosomes after cell division.

Identify that the phase where DNA is copied is specifically called the S phase, which stands for 'Synthesis' phase.

Note that during the S phase, each chromosome is duplicated to form two sister chromatids connected at the centromere.

Recognize that the G1 phase is before DNA replication, G2 phase is after DNA replication, and M phase is when the cell divides, so DNA copying does not occur in these phases.