The mitotic spindle is made of long proteins called microtubules that begin forming at opposite ends of the cell. The spindle will be responsible for separating the sister chromatids into two cells.
What allows the sister chromatids to separate?
Metaphase leads to anaphase, during which each chromosome’s sister chromatids separate and move to opposite poles of the cell. Enzymatic breakdown of cohesin — which linked the sister chromatids together during prophase — causes this separation to occur.
What events are responsible for separating sister chromatids during mitosis?
The kinetochore becomes attached to the mitotic spindle. Sister chromatids line up at the metaphase plate. The kinetochore breaks apart and the sister chromatids separate. The nucleus re-forms and the cell divides.
Do sister chromatids separate during cell division?
The two sister chromatids are separated from each other into two different cells during mitosis or during the second division of meiosis. … Sister chromatid cohesion is essential for the correct distribution of genetic information between daughter cells and the repair of damaged chromosomes.
What is the structure that forms during cell division to separate sister chromatids?
During metaphase, the sister chromatids align along the equator of the cell by attaching their centromeres to the spindle fibers. During anaphase, sister chromatids are separated at the centromere and are pulled towards opposite poles of the cell by the mitotic spindle.
What protein is responsible for holding the sister chromatids together and in what phase of mitosis does it break down?
Answer b is correct. This is one of the events that occur during anaphase. During anaphase, the cohesin proteins binding the sister chromatids together also break down, and the non-kinetochore spindle fibers lengthen, elongating the cell. Answer a occurs during metaphase, which happens before anaphase.
What is the part of the chromosome that holds the sister chromatids together?
centromeres. … that holds together the two chromatids (the daughter strands of a replicated chromosome). The centromere is the point of attachment of the kinetochore, a structure to which the microtubules of the mitotic spindle become anchored.
During which phase of mitosis do the sister chromatids move apart?
Mitosis is the process of cell division, and is separated into four stages. During prophase, the chromosomes condense and the nuclear envelope dissolves. During metaphase, the chromosomes align at the center of the cell. During anaphase, the sister chromatids are separated and pulled to opposite ends of the cell.
What does the metaphase do?
Metaphase is a stage in the cell cycle where all the genetic material is condensing into chromosomes. These chromosomes then become visible. During this stage, the nucleus disappears and the chromosomes appear in the cytoplasm of the cell.
Which component of the cytoskeleton is responsible for separating the sister chromatids during anaphase II of meiosis II?
The sister chromatids are pulled apart by the kinetochore microtubules and move toward opposite poles. Nonkinetochore microtubules elongate the cell. The process of chromosome alignment differs between meiosis I and meiosis II.
Why is the separation of chromatids necessary?
Sister chromatid separation in anaphase is an important event in the cell’s transmission of genetic information to a descendent. … Chromosome condensation, mitotic kinetochore function and spindle formation require a larger number of proteins, which are prerequisites for successful sister chromatid separation.
When sister chromatids separate what are they called?
Anaphase. During anaphase, sister chromatids separate and move to the spindle poles (Figures 2 and 3). Anaphase consists of two phases, anaphase A and B.
What happens interphase?
During interphase, the cell grows and makes a copy of its DNA. During the mitotic (M) phase, the cell separates its DNA into two sets and divides its cytoplasm, forming two new cells.
What happens during the process of cell division?
Most of the time when people refer to “cell division,” they mean mitosis, the process of making new body cells. Meiosis is the type of cell division that creates egg and sperm cells. … During mitosis, a cell duplicates all of its contents, including its chromosomes, and splits to form two identical daughter cells.
What is the function of mitosis in a cell that is about to divide?
During mitosis one cell? divides once to form two identical cells. The major purpose of mitosis is for growth and to replace worn out cells.
How is the spindle formed?
At the beginning of nuclear division, two wheel-shaped protein structures called centrioles position themselves at opposite ends of the cell forming cell poles. Long protein fibers called microtubules extend from the centrioles in all possible directions, forming what is called a spindle.