Cell Division: Mitosis and Meiosis

Study sheet excerpt

Course Outline

  1. Cell Cycle and Genetic Material
  2. Chromosome and Chromatid Counting
  3. Mitotic Phases and Cytokinesis
  4. Meiotic Divisions
  5. Meiotic Genetic Mixing
  6. Mitosis and Meiosis Compared
  7. Cellular Contexts of Meiosis

1. Cell Cycle and Genetic Material

Key Concepts & Definitions

  • Cell cycle : The sequence of events by which a mother cell grows, duplicates its genetic material, and distributes it into forming daughter cells.
  • Semi-conservative replication : Changes each chromosome from one to two chromatids without changing the chromosome number.

★ Must-know

📌 The cell cycle comprises interphase and phase M, with interphase including G1, S, and G2, while phase M includes mitosis and cytokinesis.

Further detail

  • G0 is a quiescent phase in which the cell does not divide but may carry out other cellular activities.

Memory Hook

Growth → duplication → distribution

2. Chromosome and Chromatid Counting

📌 Homologous chromosomes are the paired chromosomes of the same type, whereas sister chromatids are the two copies of one replicated chromosome.

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Quiz preview

1. What sequence of events defines the cell cycle?

2. What is the cell cycle?

3. Which sequence correctly distinguishes interphase from phase M?

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Flashcards preview

What is the cell cycle?

The sequence of events where a mother cell grows, duplicates DNA, and forms daughter cells.

Cell cycle phases

Interphase (G1, S, G2), M phase (mitosis, cytokinesis)

What phases does the cell cycle include?

Interphase (G1, S, G2) and phase M (mitosis and cytokinesis).

Semi-conservative replication

Chromosomes duplicated without changing number

What distinguishes homologous chromosomes from sister chromatids?

Homologous chromosomes are paired chromosomes of the same type, sister chromatids are two copies of one replicated chromosome.

Homologous chromosomes

Paired chromosomes of same type

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