Mitosis (UEB Contracted)
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- Synopsis
- These pages show interphase before mitosis, four stages of mitosis and daughter cells as a product of mitosis. There is a locator dot shown on each page, which will be at the top left of the page when the image is the correct way up. Mitosis is cell replication where a cell divides to produce two identical daughter cells. Late interphase - This page shows a cell immediately before mitosis starts. The cell is a large rounded shape in the centre of the page. Its nucleus fills the bottom of the cell and two centrioles are in the top of the cell. The twenty three pairs of chromosomes in the nucleus have replicated to form a mass of chromatids (double chromosomes) which are tightly coiled. Note the size of the nucleus and the centrioles in relation to the overall size of the cell are greatly enlarged for clarity. Only some of the chromatin is shown, also for clarity. Mitosis - stage one, Prophas - This page shows the start of mitosis. The cell is in the centre of the page. In the top of the cell the centrioles to the left and right have the mitotic spindle growing between them. The nucleus shows three chromatids, the double chromosomes. In reality in humans there would be twenty three chromatids. Mitosis - stage two, Metaphase - This page shows the completed mitotic spindle with a centriole to the left and right. The nuclear envelope has disappeared. The chromatids have attached themselves to the centre of the spindle by their centromeres in the centre of the image. Mitosis - stage three, Anaphase - This page shows the centromeres have separated. The microtubules of the spindle are retracting to the left and right. Each chromatid has split into single sister chromosomes and are migrating to opposite ends of the spindle to the left and right. Mitosis - stage four, Telophase - This page shows the spindle to left and to the right, nearly gone. The chromosomes have collected together and a new nuclear envelope has formed around them. To the top and bottom centre of the cell the plasma membrane is pinching in and starting to divide the cytoplasm. Identical daughter cells The cell has divided to form two genetically identical cells. Each has a nucleus to the left centre of the cell.
- Copyright:
- 2015
Book Details
- Book Quality:
- Publisher Quality
- Publisher:
- RNIB Bookshare
- Date of Addition:
- 08/04/16
- Copyrighted By:
- RNIB Bookshare
- Adult content:
- No
- Language:
- English
- Has Image Descriptions:
- No
- Categories:
- Nonfiction, Science
- Grade Levels:
- Year 10 - 4th Form - KS4, Year 11 - 5th Form - KS4
- Submitted By:
- Bookshare Staff
- Usage Restrictions:
- This is a copyrighted book.