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What is the structure at the center of the chromosomes where sister chromatids are attached?
Wiki User
∙ 12y ago
When sister chromatids are joined together they are held together by proteins, which make up the centromere. The two chromatids together make up a chromosome.
Wiki User
∙ 9y ago
Wiki User
∙ 12y agocentromere.
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How does the cell package its DNA ready for division?
At every few intervals,about 5 histones are used to pack DNA.Histones are spherical proteins. http://www.gistsupport.org/learning-center/cells-cancer-and-more/how-dna-is-packaged-in-a-cell.php
Compare and contrast meiosis 1 and 2?
Meiosis I:Starts with a homologous chromosome pairLines up at the center of the cell"S" Phase - DNA synthesizes prior to Meiosis I2N --> N2 unique cellsCrossing-overChromosomes separateMeiosis II:Starts with sister chromatids Lines up at the center of the cellNo "S" Phase - DNA does not synthesize prior to Meiosis IIN --> N4 unique cellsNo crossing overChromatids separate
What happens to chromosomes during Meiosis 2?
the chromosomes pairs line in the center of the cell the chromosomes pairs line in the center of the cell
What happens during mitosis?
The chromosomes condense and turn into 2-strand chromatids; the nuclear membrane disappears; centrosomes turn to asters and a spindle fiber begins to form. Metaphase: The chromosomes align at the center of the cell (equatorial plate) and each chromosome is attached to the spindle fiber Anaphase: The chromatids (1 strand) separate and the centromere divides, where each single strand chromatid ascends to opposite poles of the cell (polar ascension) Telophase: The cellular membrane cleaves and the nuclear membrane appears again and the asters turn into centromeres once again We end up with 2 daughter cells each maintaining the same number of chromosomes that the mother cell has (2n) because mitosis is and equational division which preserves the genetic information.... Hope this helps...
How would you describe the process of mitosis?
When a cell duplicates itself, splitting into 2 daughter cells, identical to themselves and to the mother cell, it is used by body cells. The stages are prophase metaphase anaphase and telophase. The DNA in the nucleus become tightly coiled and the nuclear membrane dissipates, the chromasones line up at the center of the cell and then split to 2 separate but identical chromatids. They are then pulled by spindle fibers to the separate sides of the cell. Afterwards is cytokanisis which is not an actual phase of mitosis. (though it is a phase it is separate to mitosis) look up mitosis phases on wikapedia for more depth ;) good luck!!
What is a cell structure that joins two sister chromatids of a chromosomes?
The cell structure that joins two sister chromatids into one single chromosome is called the centromere. This is at the center of the sister chromatids.
Description of metaphase?
the chromosomes will move in the equatorial plane
What is the role of the microtubules?
Microtubules attach to the to a structure on the sister chromatids called the kinetochore. Throwing the chromosomes into an agitated motion moving them towards the center of the cell. Then during anaphase they will help with the migration of chromosomes to opposite ends of the cell.
What is the name of the structure that connects the sister chromatids?
The cell structure that joins two sister chromatids into one single chromosome is called the centromere. This is at the center of the sister chromatids.
During which phase of mitosis do the sister chromatids line up in the center of the cell?
Chromosomes are composed of two chromatids during the prophase and metaphase of mitosis. The chromosomes of formed in prophase and line up in metaphase.
During sister chromatids are lined up along the metaphase plate.?
At the center! Sister chromatids are identical copies of a given chromosome. before the cell divides it must first copy the entire genome. sister chromatids are shaped like > and < and are linked at the centromere. The tips are called telomeres.
Put the following stage of the cell cycle in order anaphase prophase metaphase and telophase?
Prophase- the chromatin condenses into chromosomes. Metaphase- The chromosomes line up across the center of the cell. Anaphase- The sister chromatids separate into individual chromosomes and are moved apart.
Chromosomes are called what once they have duplicated in preparation for division?
During prophase, the chromosomes in a cell's nucleus condense to the point that they can be viewed using a light microscope. ... Because each chromosome was duplicated during S phase, it now consists of two identical copies called sister chromatids that are attached at a common center point called the centrome or chromosomal duplications
What significant event happens in metaphase of mitosis?
The chromosome pairs are lined up in the center of the cell, parts of the cytoskeleton have formed the mitotic spindle and are preparing to pull the pairs apart.
How does the cell package its DNA ready for division?
At every few intervals,about 5 histones are used to pack DNA.Histones are spherical proteins. http://www.gistsupport.org/learning-center/cells-cancer-and-more/how-dna-is-packaged-in-a-cell.php
What happens to the amount of chromosomes during cell division?
During cell division the chromosomes are copied and they form sister chromatids. Then the mitotic spindle attaches to the sister chromatids and pulls them apart, splitting the nucleus in two. Then the cell goes through cytokenesis and the cell membrane is pinched together in the center, this divides the organelles and the cytoplasm between the two daughter cells.
What structure helps anaphase?
Centriole or microtubule organizing center .
