Biologists at University of Massachusetts Amherst are studying a molecular cell system called Polar Ejection Force (PEF) and its role in detecting and correcting errors in cell division which can lead to cell death or human diseases.
This process of cell division replaces and repairs old and damaged tissues. There are two types of division processes; mitosis and meiosis. Mitosis is the process where the cell divides to produce two genetically identical cells.
Meiosis is a division process that is associated with sexual reproduction. It is where one diploid cell (a cell containing paired chromosomes from both parents) undergoes recombination of each pair of parental chromosomes, and then two stages of cell division, resulting in four haploid cells (gametes).
A new process of cell division called Klerokinesis has been discovered. This process is believed to ensure the integrity of the cell as it divides.
It is estimated that during one's lifetime, there would have been 1x1013 cell divisions that have occurred since inception.
In humans, the cell stops dividing after an average of 52 divisions. This is known as the Hayflick limit and at this stage, the cell is termed as senescent. The cells stop dividing because each division shortens the protective parts of the DNA which at the Hayflick limit is all consumed.
This process of cell division replaces and repairs old and damaged tissues. There are two types of division processes; mitosis and meiosis. Mitosis is the process where the cell divides to produce two genetically identical cells.
Meiosis is a division process that is associated with sexual reproduction. It is where one diploid cell (a cell containing paired chromosomes from both parents) undergoes recombination of each pair of parental chromosomes, and then two stages of cell division, resulting in four haploid cells (gametes).
A new process of cell division called Klerokinesis has been discovered. This process is believed to ensure the integrity of the cell as it divides.
It is estimated that during one's lifetime, there would have been 1x1013 cell divisions that have occurred since inception.
In humans, the cell stops dividing after an average of 52 divisions. This is known as the Hayflick limit and at this stage, the cell is termed as senescent. The cells stop dividing because each division shortens the protective parts of the DNA which at the Hayflick limit is all consumed.
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| source: Wikipedia |
