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Questions and Answers
During mitosis, the nuclear envelope breaks down in the prophase stage.
During mitosis, the nuclear envelope breaks down in the prophase stage.
True (A)
Mitosis results in the production of two daughter cells that are genetically different from the parent cell.
Mitosis results in the production of two daughter cells that are genetically different from the parent cell.
False (B)
Cell division is a process that occurs independently of the cell cycle.
Cell division is a process that occurs independently of the cell cycle.
False (B)
The functions of cell division include reproduction and overall growth and proliferation of the organism.
The functions of cell division include reproduction and overall growth and proliferation of the organism.
At the end of meiosis II, four identical, diploid daughter cells are formed.
At the end of meiosis II, four identical, diploid daughter cells are formed.
Meiosis I leads to different genetic composition of the daughter cells due to the random arrangements of bivalents and crossing over.
Meiosis I leads to different genetic composition of the daughter cells due to the random arrangements of bivalents and crossing over.
In humans, each haploid daughter cell produced by meiosis has 46 chromosomes.
In humans, each haploid daughter cell produced by meiosis has 46 chromosomes.
Each chromosome is composed of three sister chromatids.
Each chromosome is composed of three sister chromatids.
Prophase I is the first stage of mitosis.
Prophase I is the first stage of mitosis.
During the zygotene stage, homologous chromosomes begin to pair.
During the zygotene stage, homologous chromosomes begin to pair.
Recombination or crossing over takes place during the leptotene stage.
Recombination or crossing over takes place during the leptotene stage.
During meiosis II, the nuclear membrane initiates to form, and the spindle fibers appear again.
During meiosis II, the nuclear membrane initiates to form, and the spindle fibers appear again.
In Metaphase II, chromosomes do not replicate any further and begin migration towards the center of the cell.
In Metaphase II, chromosomes do not replicate any further and begin migration towards the center of the cell.
During Anaphase II, the daughter chromosomes are pulled towards the same pole of the cells with the help of the spindle fibers.
During Anaphase II, the daughter chromosomes are pulled towards the same pole of the cells with the help of the spindle fibers.
Cytokinesis II involves the second cytoplasm division, resulting in the formation of two individual daughter cells.
Cytokinesis II involves the second cytoplasm division, resulting in the formation of two individual daughter cells.
Flashcards
Mitosis nuclear envelope breakdown
Mitosis nuclear envelope breakdown
The nuclear envelope dissolves during the prophase stage of mitosis.
Daughter cells in mitosis
Daughter cells in mitosis
Mitosis produces two genetically identical daughter cells.
Cell division vs. cell cycle
Cell division vs. cell cycle
Cell division is part of the cell cycle, not separate.
Functions of cell division
Functions of cell division
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Meiosis II daughter cells
Meiosis II daughter cells
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Meiosis I genetic diversity
Meiosis I genetic diversity
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Human haploid chromosomes
Human haploid chromosomes
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Sister chromatids per chromosome
Sister chromatids per chromosome
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Prophase I vs. mitosis prophase.
Prophase I vs. mitosis prophase.
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Homologous chromosome pairing
Homologous chromosome pairing
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Crossing over in meiosis
Crossing over in meiosis
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Meiosis II nuclear membrane
Meiosis II nuclear membrane
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Metaphase II chromosome replication
Metaphase II chromosome replication
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Anaphase II chromosome movement
Anaphase II chromosome movement
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Cytokinesis II outcome
Cytokinesis II outcome
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Study Notes
Mitosis and Cell Division
- Mitosis results in the production of two genetically identical daughter cells.
- Cell division is a process that occurs independently of the cell cycle.
- Functions of cell division include reproduction, growth, and proliferation of the organism.
Meiosis
- Meiosis I leads to different genetic composition of daughter cells due to random arrangements of bivalents and crossing over.
- At the end of meiosis II, four identical, diploid daughter cells are formed.
- In humans, each haploid daughter cell produced by meiosis has 23 chromosomes.
Prophase I and Meiosis I
- Prophase I is the first stage of meiosis.
- During the zygotene stage, homologous chromosomes begin to pair.
- Recombination or crossing over takes place during the leptotene stage.
Meiosis II
- During meiosis II, the nuclear membrane initiates to form, and the spindle fibers appear again.
- In Metaphase II, chromosomes do not replicate any further and begin migration towards the center of the cell.
- In Anaphase II, the daughter chromosomes are pulled towards the same pole of the cells with the help of the spindle fibers.
- Cytokinesis II involves the second cytoplasm division, resulting in the formation of two individual daughter cells.
Chromosome Structure
- Each chromosome is composed of two sister chromatids.
- Note: The text mentions three sister chromatids, but this is likely an error, as each chromosome typically has two sister chromatids.
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Description
Test your knowledge about the steps and results of Meiosis I and Meiosis II, including telophase I, cytokinesis I, and prophase II. Understand the formation of daughter cells with half the number of chromosomes as the parent cell in Meiosis I.
