What is chromatid?
Within the nucleus of each cell, DNA is found as chromosomes for this organism. Depending on the type of organism, the number of different chromosomes will vary, but the structure of chromosomes will not. Each chromosome is made up of two identical DNA springs called chromatids. When the cell does not divide, it replicates its DNA so that each chromosome is made up of two sister chromatids that lie side by side. Although it seems to run in parallel with each other, there is a section where each chromatide is associated with a second called Centromere. Mitosis is duplication of DNA and nucleus to form two cores, resulting in two genetically identical daughter cells are produced from one parent cell. Mitosis is used for growth and repair and replacement of cells. Meiosis occurs only in reproductive cells to produce sex cells or gametes that have half the amount of DNA as a parent cell.
during the initial phaseE mitosis is condensed or shorter and stronger. At this time, each chromatide couple can be seen when the core is colored. Chromosomes are sorted across the "equator" of the cells and chromatids are stretched. Each chromatide is attracted to the opposite ends or poles of the cell so that a new nuclear membrane can form around them and then the cell can divide.
As soon as the cell completes the division, the mitosis is completed. At this time, chromatids are now the chromosomes of the new core that inhabit. Before the cell division occurs, they are replicated to ensure that there are two identical copies of each chromosome.
There is a similar process during meiosis. The main difference between them is that meiosis is crazy on two mitotic divisions. During the first division, the pairs of chromosomes are sorted along the equator and separates. The resulting cells now have only half the DNA because they have only one copy of each chromosome. All chromosomes are still completely intact and are made up of two sisterchromatids.
The second division of meiosis is identical to mitosis. Chromosomes are aligned along the equator and the chromatides are stretched to separate the poles of the cells. They form a new core and the cell is divided. However, the resulting cells are not genetically identical because they have only half as much DNA as the initial parent cell.
genetic diversity can be further increased during meiosis. In the profse phase of meiosis I or in the first division, chromatide may exceed chromatide from one chromosome from another chromosome. When pairs of identical chromosomes, one of each parent is sorted along the cell equator, the chromatids can circle around. Fragments from each chromatide may be confused to a second chromosome, changing genes found in the initial chromosome. The change in genetic information about chromosomes is formed by non -identical daughter cells that can increase genetic diversity.