Three major cell populations in the body don't undergo mitosis. Post-mitotic cells don't divide further after they reach maturity. These include erythrocytes, platelets, neurons, retinal photoreceptors, cardiac cells and skeletal muscle cells. Quiescent cell populations aren't actively progressing through the cell cycle but are still capable of mitosis if stimulated. Finally, senescent cells damaged by wear and tear don't undergo mitosis.Know More
The reason mature red blood cells and platelets don't divide is that they lack nuclei. Erythrocytes lose their nuclei at the reticulocyte stage of development. Platelets are cytosolic fragments of giant bone cells called megakaryocytes; hence, they were never nucleated in the first place.
As a general rule, neurons don't undergo mitosis except for the progenitors of taste bud cells and possibly a few neurons in the brain's hippocampus. Glial cells such as astrocytes and oligodendrocytes share a common embryonic origin with neurons; however, these cells can proliferate, especially in response to trauma.
Skeletal and cardiac muscle fibers present a puzzle. Skeletal muscle cells have multiple nuclei but undergo little or no mitosis after fetal life. Similarly, cardiac cells spend their lives in a stage of the cell cycle known as G2 arrest. Although this prevents cardiac cells from regenerating after a heart attack, it also accounts for the rare incidence of tumors arising from skeletal or cardiac muscle.Learn more about Cells
The biology of DNA is as complex as the DNA material itself. The somatic cells or body cells are produced in mitosis. These types of cells differ from gametes or sex cells because they are not expected to fuse with other cells in the process of reproduction. At the end of mitosis, the daughter cells are identical to the parent cell, and they remain that way until their death.Full Answer >
Mitosis results in two identical daughter cells when the parent cell divides in half with each part receiving the DNA, organelles and cytoplasm needed to become a full cell. After mitosis, each cell uses the DNA it received as a template for the missing DNA.Full Answer >
Animal cells and plant cells have very different mechanisms of mitosis. This is mainly due to the structural makeup of the different types of cells. For example, the cell wall affects how plant cells undergo mitosis.Full Answer >
Animal cells are eukaryotic cells, or cells that contain a membrane-bound nucleus. The nucleus holds the DNA of the cell that provides the cell with instructions for life.Full Answer >