The Cell Cycle GarrEtt Fitzsimons

The cell cycle is a series of events from the time a cell forms until the cytoplasm divides. Most of the cycle of life is spent during the phase of interphase.

Interphase

Interphase of a cell's life is the interval between mitosis and when a cell grows. During this time period, the cell doubles the number of its cytoplasm comments and also replicates its own DNA. There are three stages of interphase. G1 is the phase where the metabolic activities occur and when the cell grows to its full potential. During stage S, the cell doubles its DNA. G2 is the final stage where proteins synthesis is needed for cell division and it's also a checkpoint to make sure there are no Mutations.

Prophase

Prophase is the first stage of mitosis. This is when the chromosomes condense together even further, and one of the two centrosomes move of opposite end of cell. A spindle forms when microtubes assemble and grow. The nuclear envelope is broken and the sister chromatids are connected to the opposite centrosomes.

The Final stages of mitosis are metaphase, anaphase, and telophase. Metaphase is the formation of all the chromosomes midway between both spindle poles. Anaphase is when the sister chromadits speprate and move towards opposite swindle poles. Telophase is when the chromosomes arrive at the swindle poles and decondense forming two new nuclei form.

Telomeres

The first cloning of a lamb looks successful at first but showed a Great deal of premature aging. This could of been cause by extremely short Telomeres. Telomeres are are noncoding repeat DNA sequences that repeated thousands of times, that are found at the ends of eukaryotic chromosomes. They acted as buffers between the lose of valuable DNA. When chromosomes contain telomeres that are too short, the checkpoint halts the grows and leads to a cell's death. Telomerase reverse the telomarse shorterning that usually occurs after DNA replication. Although telomerase holds therapeutic promise for rejuvenation for tiussues it could also lead to cancer.

Cancer

Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. Not all tumors are cancerous; benign tumors do not spread to other parts of the body.Mutations in multiple checkpoint genes are required to transform a normal cell into a malignant one. Lifestyle choices can reduce one’s risk of acquiring mutations as in smoking. Some neoplasms can be detected with periodic screening such as gynecology or dermatology exams. If detected early enough, many types of malignant neoplasms can be removed before metastasis occurs.

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