18 Questions
During which stage of mitosis do sister chromatids separate and move to opposite poles?
Anaphase
What is the main event in prometaphase of mitosis?
Nuclear envelope breaks down
Which phase of mitosis involves the chromosomes aligning at the cell equator?
Metaphase
What happens to the chromosomes in telophase of mitosis?
They decondense and are enclosed in two nuclei
In which stage of mitosis do chromosomes condense and become visible?
Prophase
What characterizes the movement of centrosomes towards opposite poles in prophase of mitosis?
Nucleoli begin to disappear
During which stage of cell division does cytokinesis typically begin?
Anaphase
Which stage of meiosis involves the independent alignment of homologs and crossing-over?
Prophase I
What happens during prometaphase in mitosis?
Nuclear envelope breaks down and spindle fibers attach to chromosomes
Which of the following statements about telophase is correct?
Nuclear envelope reforms around separated chromosomes
During which phase do homologous chromosomes pair up and crossing-over occurs?
Leptotene
In which stage of cell division do sister chromatids segregate to different daughter cells?
Anaphase II
During which stage of mitosis does the nuclear envelope break down?
Prophase
In which stage of mitosis do the sister chromatids attach to microtubules from opposite poles?
Prometaphase
At which stage of mitosis do the chromosomes align on the metaphase plate?
Metaphase
What happens to the centromeres during anaphase of mitosis?
They split simultaneously
In which phase of mitosis does the nuclear envelope form around each group of chromatids?
Telophase
What happens to the spindle fibers during telophase of mitosis?
They disappear
Study Notes
Mitosis Stages
- Sister chromatids separate and move to opposite poles during anaphase.
- The main event in prometaphase is the breakdown of the nuclear envelope.
- Metaphase involves the alignment of chromosomes at the cell equator.
- In telophase, chromosomes uncoil and a nuclear envelope forms around each group of chromatids.
- Chromosomes condense and become visible during prophase.
- During prophase, centrosomes move towards opposite poles, characterized by the formation of a spindle apparatus.
- Cytokinesis typically begins during telophase.
Meiosis
- Prophase I involves the independent alignment of homologs and crossing-over.
Mitosis Events
- During prometaphase, the nuclear envelope breaks down, and microtubules from opposite poles attach to the sister chromatids.
- In anaphase, the centromeres divide, and sister chromatids move to opposite poles.
- In metaphase, the chromosomes align on the metaphase plate.
- In telophase, the nuclear envelope forms around each group of chromatids, and the spindle fibers disappear.
- Sister chromatids segregate to different daughter cells during anaphase.
- The nuclear envelope breaks down during prometaphase.
Test your knowledge on the stages of mitosis as presented in the McGraw Hill material, including prometaphase, breakdown of the nuclear envelope, formation of the mitotic spindle, and attachment of sister chromatids to microtubules.
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