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Harrison-CellDivis.
cell division lab
| Question | Answer |
|---|---|
| In what stage do cells synthesize unique proteins for growth and maintenance and enzymes/other substances which may be used outside the cell? | Interphase |
| What is cytokinesis? | division of the cytoplasm |
| What is chromatin? | Chromatin is the complex combination of DNA and proteins that makes up chromosomes |
| What 3 phases make up interphase? | G1 S G2 |
| What happens during G1? | Organelles grow and replicate |
| What starts replication during G1 but dont finish until the end of G2? | centrioles |
| What is the time of DNA synthesis called? | S phase (synthesis) |
| What happens during G2? | The cells functional focus shifts to producing proteins, enzymes and other molecules required to conduct mitosis |
| DNA duplication results in | replicated chromosomes that appear as two sister chromatids joined as a common centromere |
| ***stage*** Chromatin becomes visible as a round clump of purple/black dots/rods | prophase |
| When is prophase considered to begin? | At the moment when chromosomes first become visible |
| ***stage*** nucleoli and the nuclear membrane disappear into the cytoplasm | prophase |
| ***stage*** centrioles separate and start their movement around the nucleus to opposite ends of the cell | prophase |
| centrosomes are also called | centrioles, asters, or spindle fibers |
| spindle apparatus is also called | mitotic spindle |
| What is the spindle apparatus? | a series of microtubles that form between the centrioles |
| What are the fibers radiating from the centrioles into the cytoplasm? | astral rays |
| ***stage*** centromeres of each chromosome line up on the equatorial plane between the two poles | metaphase |
| ***stage*** cebrineres split in half and each chromatid separates from its partner to become an individual chromosome | anaphase |
| ***stage*** the microtubules of the spindle apparatus arrached to the centromeres appear to be pulling the chromosomes to the poles | anaphase |
| what is another name for the equatorial plane? | metaphase plate |
| ***stage*** basically the revers of prophase | telophase |
| what landmark shows a cell is in telophase? | cleavage furrow |
| ***stage*** the two identical sets of chromosomes have reached the opposite poles | telophase |
| ***stage*** chromatids separate at their centromere region and become chromosomes | anaphase |
| ***stage*** astral rays and spindle fibers disappear | telophase |
| ***stage*** nuclear membrane is reformed | telophase |
| ***stage*** cell membrane begins to pinch inward | telophase |
| ***stage*** chromosomes line up on equatorial plane | metaphase |
| ***stage*** chromosomes become visible as the chromatin shortens and coils | prophase |
| ***stage*** formation of the cleavage furrow marks the end of this stage | anaphase |
| ***stage*** astral rays and spindle fibers develop | prophase |
| ***stage*** nuclear membrane and nucleoli disappear | prophase |
| ***stage*** centrioles separate and move to opposite ends of cells | prophase |
| ***stage*** spindle fibers contract pulling the chromosomes toward the poles | anaphase |
| ***stage*** chromosomes begin to uncoil and disappear from view | telophase |
| ***stage*** cytoplasm is divided among the two daughter cells | telophase |
Created by:
mastrgurl
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