Podcast
Questions and Answers
What is the role of spindle fibres during mitosis?
What is the role of spindle fibres during mitosis?
- To form new nuclear membranes
- To condense the chromosomes
- To separate sister chromatids (correct)
- To replicate DNA
What happens to the chromosomes after their DNA becomes loosely coiled?
What happens to the chromosomes after their DNA becomes loosely coiled?
- They are suspended in the cytoplasm
- They are broken down into nucleotides
- They replicate again
- They condense and become visible as chromatids (correct)
What is formed at the equator of the cell during mitosis?
What is formed at the equator of the cell during mitosis?
- Rope-like spindle fibres
- The nuclear membrane
- Daughter cells
- Sister chromatid pairs (correct)
What occurs immediately after the spindle fibres contract during mitosis?
What occurs immediately after the spindle fibres contract during mitosis?
What are sister chromatids?
What are sister chromatids?
How many chromosomes are present in each new nucleus formed after mitosis in a diploid cell with four chromosomes?
How many chromosomes are present in each new nucleus formed after mitosis in a diploid cell with four chromosomes?
During what phase do spindle fibres attach to the centromere region of sister chromatids?
During what phase do spindle fibres attach to the centromere region of sister chromatids?
What is the significance of cell division through mitosis?
What is the significance of cell division through mitosis?
Flashcards
Mitosis
Mitosis
The process of a single cell dividing into two identical daughter cells.
Chromatid
Chromatid
The replicated copy of a chromosome that is visible during mitosis.
Centromere
Centromere
The structure that holds sister chromatids together before they separate during mitosis.
Spindle fibres
Spindle fibres
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Equator
Equator
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Cell poles
Cell poles
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Chromosome Replication
Chromosome Replication
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Chromosome Condensation
Chromosome Condensation
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Study Notes
Mitosis: Cell Division
- Mitosis allows for growth and replacement of cells.
- Most multicellular organisms have specialized cell types for specific functions.
- Before mitosis, DNA replicates to create identical copies of each chromosome.
- Replicated chromosomes consist of two identical chromatids joined at the centromere.
- Chromosomes condense, becoming visible as pairs of chromatids.
- The nuclear membrane breaks down.
- Spindle fibers attach to centromeres, lining up chromatid pairs at the equator.
- Spindle fibers contract, separating sister chromatids to opposite poles.
- Sister chromatids become chromosomes.
- Chromosomes decondense and new nuclear membranes form around them.
- Cytoplasm divides, creating two genetically identical daughter cells.
- The chromosome number remains the same in daughter cells during mitosis.
- Each daughter cell receives complete genetic information.
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Description
Explore the key stages of mitosis, the process of cell division that ensures growth and replacement of cells in multicellular organisms. This quiz covers DNA replication, chromatid separation, and the formation of genetically identical daughter cells. Test your understanding of how mitosis maintains chromosome number and function.
