Chapter 11 By liam hill

Cell cycle

The cell cycle is the lifetime of a cell. There are four main phases of the cell cycle: S phase, G1, G2, and mitosis. S is the DNA synthesis phase, G1 and G2 are growth phases, and mitosis is cell division

A cell in interphase

Interphase is the part of a cell cycle that refers to all of the phases besides mitosis. If the cell is in interphase that means it is not undergoing cell division

A cell in prophase

Prophase is the first part of mitosis. During prophase you can see the chromosomes inside the nucleus.

A cell in metaphase

During metaphase, the second step of mitosis, the chromosomes align themselves in the center of the cell and attach to the spindle fibers that will pull them to each new cell

A cell in anaphase

The chromosomes are pulled to opposite poles of the spindles and the cell is ready to divide.

A cell in telophase

In telophase the chromosomes are in opposite ends of the cell. A new nuclear envelope develops around the chromosomes and the cell begins to divide.

Telomeres

Telomeres are small nucleotide "caps" at each end of a chromosome. The purpose of these telomeres is to prevent the DNA from unraveling or the chromosome from binding with another chromosome.

Cancer

Cancer is a disease caused by repeated and very fast growth of abnormal cells. These abnormal cells grow through normal tissue and build up something called a tumor.

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