n-6 cell division what do cells spend their time doing? why do they do this?
TRANSCRIPT
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N-6 Cell Division
What do cells spend their time doing? Why do they do this?
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Cell Cycle: The regular sequence of growth and division that happens in cells
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Stage 1: Interphase
During interphase, the cell grows to its mature size, makes a copy of its DNA, and prepares to divide into two cells Growth – during the first part of interphase, the
cell doubles in size DNA Replication – the cell makes a copy of its
DNA in the nucleus. This means that there are TWO copies of the DNA (instructions) in each nucleus
Cells spend 90% of their lives in this stage
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Stage 2: Mitosis
During mitosis, one copy of the DNA is distributed into each of the two ‘daughter’ cells.
This is divided into four parts: Prophase Metaphase Anaphase Telophase
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Chromosomes:(humans have 23 pairs)
DNA
Centromere
Two Chromatids
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Mitosis - Prophase
Chromosomes are visible
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Mitosis - Metaphase
Chromosomes line up in center of the cell
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Mitosis - Anaphase
Chromatids are pulled to opposite ends of the cell
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Mitosis - Telophase
New nuclear membranes form around each new set of chromosomes
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Stage 3: Cytokinesis
The cell membrane ‘pinches’ together in the middle of the cell forming two ‘daughter’ cells.
Cytoplasm divides, distributing the organelles into each of the new cells.
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Can we identify the following?
1. Prophase2. Metaphase3. Cytokinesis4. Telophase5. Telophase6. Metaphase7. Prophase8. Anaphase9. Ana or Telo?10. Interphase
10
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DNA Replication
DNA Replication ensures that each daughter cell will have all of the genetic information it needs to carry out its activities.
There are four pieces of the puzzle: Adenine and Thymine Cytosine and Guanine
The order that these ‘pieces’ fit together determine our genetics! Animation