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

9. Mitosis and Meiosis

Mitosis

Genetics

9. Mitosis and Meiosis

Mitosis

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2:34 minutes

Problem 9

Textbook Question

Describe the phases of the cell cycle and the events that characterize each phase.

Verified step by step guidance

Identify the main phases of the cell cycle: Interphase and Mitotic (M) phase.

Break down Interphase into its sub-phases: G1 (Gap 1), S (Synthesis), and G2 (Gap 2).

Describe the events in G1 phase: Cell growth and preparation for DNA replication.

Explain the S phase: DNA replication occurs, resulting in two sister chromatids for each chromosome.

Outline the G2 phase: Further cell growth and preparation for mitosis, including the synthesis of proteins necessary for cell division.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Cell Cycle

The cell cycle is a series of phases that a cell goes through to grow and divide. It consists of four main stages: G1 (gap 1), S (synthesis), G2 (gap 2), and M (mitosis). Each phase is characterized by specific events that prepare the cell for division, ensuring proper replication and distribution of genetic material.

Mitosis

Mitosis is the process of cell division that results in two genetically identical daughter cells. It is divided into several stages: prophase, metaphase, anaphase, and telophase, each involving distinct changes in the cell's structure and organization. Mitosis ensures that each daughter cell receives an exact copy of the parent cell's DNA.

Checkpoints

Checkpoints are regulatory mechanisms in the cell cycle that monitor and control the progression of the cell through its phases. They ensure that the cell is ready to proceed to the next phase by checking for DNA damage, proper DNA replication, and adequate cell size. If issues are detected, the cell cycle can be halted to allow for repairs or, if necessary, trigger programmed cell death.