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cell cycle
Term | Definition |
---|---|
The DNA is organized into structures called | chromosomes |
riosomoes | are in bacteria and a single circular structure of DNA. |
Cell division in these cells is very simple. They split into 2 new cells with one copy of DNA. The division is called ______________________________. | binary fission |
humans have pairs of homologous | 23 |
how many chromosomes do we have in all | 46 |
interphase | stage 1 |
as the cell grows what dose it copy | organelles and chromosomes |
G1 | first growth phase - cell doubles in size and doubles the number of organelles |
S | Synthesis phase DNA is replicated during this phase |
G2 | second growth phase Proteins are created to help the cell divide |
mitosis | second stage |
The _ chromatids separate. The complicated process of chromosome separation is _ mitosi_. This process makes sure each new cell receives a copy of each chromosome and is divided into 4 phases: | prophase, metaphase, anaphase, telophase |
prophase | he nucleus condenses to form chromosomes, spindle fibers form, and the nuclear membrane breaks down. |
metaphase | the chromosomes line up across the center of the cell and attaches to the spindle fibers. |
anaphase | the centromeres split, the chromatids separate, the cell stretches and begins to pull apart. |
telophase | chromosomes begin to stretch out and a new nuclear membrane forms around the chromosomes |
cytokinesis | The cell divides and produces two cells that are identical to the original cell. |