Chapter 11 How cells reproduce

A chain of events that begins when a cell forms and goes until the cell's cytoplasm splits into two.
For most cells the longest part of their cell cycle sequence is gone trough in the interphase stage of the cycle. Interphase is known as the period inside mitotic divsions where the cell's will grow. Interphase has 3 stages which are known as G1, S, and G2. G1 is known for cell growth, S is known for DNA synthesis, and G2 is like a checkpoint as it is where the protein needed for cell synthesis is used. Interphase happens before mitosis and chromosomes are loosened to allow transcription and DNA replication in it.
Early on in the sequence of prophase the chromosomes will pack tugtlg to prepare for nuclear division. During prophase the nucleolus of the cell will disappear. At the end of prophase the nuclear envelope will disappear. Prophase is the first stage of mitosis. In it one of the two chromosomes will move to the other side of te cell. The microtunukes will also assemble and bind together to create something known as a spindle which works to move chromosomes. In prophase sister chromosomes are also attached to opposite centrosomes.
Metaphase begins when all the microtubules are the same length and align midway between the spindle poles.
The spindle pulls apart the the sister chromatids of each duplicated chromosome and brings them towards opposite spindle poles in the next step which is known as anaphase. In this each DNA molecule turns into a different chromosome.
When two groups of chromosomes arrive at the spindle poles telophase begins. Each cluster contains the same number and types of chromosomes as the parent cell nucleus had. This would be two of each type of the parent cell was a diploid. Each set of chromosomes then loosens up again after a new nuclear envelope from son each. Once this is done it not only marks the end of telophas, but also mitosis.
Telomeres are no coding repeated DNA sequence at the end of chromosomes. They protect the coding sequences from degradation.
Cancer is a disease that happens when a malignant neoplasms physically and metabolically distorts body tissues.


Created with images by qimono - "blood cells red"

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