Understanding Mitosis and Meiosis
Biology Broward Campus - American Heritage Schools Sources (1)
Quiz
Type to make changes
Understanding Mitosis and Meiosis
Introduction to Cell Division See all Notes New
Cell division is a fundamental process in all living organisms, facilitating growth, repair, and reproduction. There are two primary types of cell
division: mitosis and meiosis. Understanding the intricacies of each process is essential for grasping how life propagates and maintains itself.
Mitosis: Purpose and Process
Purpose of Mitosis
Growth and Repair: Mitosis is crucial for producing identical cells, contributing to an organism's growth, repair, and maintenance.
Frequency: The cell divides once during mitosis.
Stages of Mitosis
1. Prophase
Events: During prophase, the nuclear envelope disappears, DNA coils into chromosomes, and spindle fibers begin to form.
Visual: [Draw labeled image of prophase]
2. Metaphase
Events: Chromosomes (sister chromatids) align at the cell's equator, attached to the spindle fibers.
Visual: [Draw labeled image of metaphase]
3. Anaphase
Events: Spindle fibers shorten, separating sister chromatids and pulling them toward opposite poles.
Visual: [Draw labeled image of anaphase]
4. Telophase
Events: The nuclear envelope reforms around the separated chromatids, which uncoil back into chromatin. The cell begins to cleave.
Cytokinesis
Events: Division of the cytoplasm, resulting in two identical diploid cells.
Integration: Cytokinesis follows telophase but is not technically part of mitosis.
Meiosis: Purpose and Process
Purpose of Meiosis
Reproduction: Meiosis is responsible for producing gametes, reducing the chromosome number by half and ensuring genetic diversity.
Frequency: The cell undergoes two rounds of division during meiosis.
Stages of Meiosis
Meiosis I
1. Prophase I
Events: Homologous chromosomes pair up and exchange segments (crossing over), increasing genetic variation.
:
Biology Broward Campus - American Heritage Schools Sources (1)
Quiz
Type to make changes
Understanding Mitosis and Meiosis
Introduction to Cell Division See all Notes New
Cell division is a fundamental process in all living organisms, facilitating growth, repair, and reproduction. There are two primary types of cell
division: mitosis and meiosis. Understanding the intricacies of each process is essential for grasping how life propagates and maintains itself.
Mitosis: Purpose and Process
Purpose of Mitosis
Growth and Repair: Mitosis is crucial for producing identical cells, contributing to an organism's growth, repair, and maintenance.
Frequency: The cell divides once during mitosis.
Stages of Mitosis
1. Prophase
Events: During prophase, the nuclear envelope disappears, DNA coils into chromosomes, and spindle fibers begin to form.
Visual: [Draw labeled image of prophase]
2. Metaphase
Events: Chromosomes (sister chromatids) align at the cell's equator, attached to the spindle fibers.
Visual: [Draw labeled image of metaphase]
3. Anaphase
Events: Spindle fibers shorten, separating sister chromatids and pulling them toward opposite poles.
Visual: [Draw labeled image of anaphase]
4. Telophase
Events: The nuclear envelope reforms around the separated chromatids, which uncoil back into chromatin. The cell begins to cleave.
Cytokinesis
Events: Division of the cytoplasm, resulting in two identical diploid cells.
Integration: Cytokinesis follows telophase but is not technically part of mitosis.
Meiosis: Purpose and Process
Purpose of Meiosis
Reproduction: Meiosis is responsible for producing gametes, reducing the chromosome number by half and ensuring genetic diversity.
Frequency: The cell undergoes two rounds of division during meiosis.
Stages of Meiosis
Meiosis I
1. Prophase I
Events: Homologous chromosomes pair up and exchange segments (crossing over), increasing genetic variation.
:
