What are the four phases of mitosis?
Mitosis occurs in prokaryotic✔ eukaryotic cells.
What is the end result of mitosis?
During the final stage of the cell cycle, cytokinesis allows the cell to finish dividing, creating one cell✔ two cellsthree cells with ✔ identicaldifferent copies of DNA.
prophase✔ metaphaseanaphasetelophase Sister chromatids line up along the middle of the cell.
prophasemetaphaseanaphase✔ telophase Chromosomes disperse and are no longer visible.
✔ prophasemetaphaseanaphasetelophase Chromatin condenses into chromosomes, and spindles begin to form.
prophasemetaphase✔ anaphasetelophase Sister chromatids separate and move to opposite sides of the cell.
Why is mitosis important to organisms? Check all that apply.
What would happen to an organism if mitosis did not occur? Check all that apply.
Explain the process of tissue cultures using healthy cells.
A tissue sample is taken from a living organism and placed in a culture. The healthy cells divide by mitosis, growing into a single layer. They stop dividing when they touch neighboring cells, but can divide to fill a space if a cell dies. They usually undergo about 20 to 50 divisions before stopping.
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Explain the process of tissue cultures for cancer cells.
Cancer cells are taken from a living organism and grown in a culture. They grow at an uncontrolled rate, do not stop growing when they touch other cells, and can form multiple layers. Unlike normal cells, they can undergo unlimited mitotic divisions.
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Describe the benefits to using tissue cultures to study medications used for treating cancer cells.
Tissue cultures allow medications to be tested on cancer cells without exposing patients to unnecessary drugs. Scientists can identify treatments that slow or stop the cells’ growth and use those findings to guide treatment for patients.
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