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 triggers the separation of chromatids during mitosis quizlet?
Sister chromatids cannot be separated during mitosis. Separase is an enzyme that cleaves cohesin, a chromosomal protein complex that joins sister chromatids together. When cohesin is cleaved, anaphase is triggered and spindle fibers pull sister chromatids to opposite ends of the cell.
What pulls apart the chromatids during mitosis?
During anaphase, the microtubules attached to the kinetochores contract, which pulls the sister chromatids apart and toward opposite poles of the cell (Figure 3c). At this point, each chromatid is considered a separate chromosome.
What controls separation of sister chromatids?
The inner centromere protein (INCENP) antigens movement from inner centromere to midbody during mitosis. The spindle is required for the process of sister chromatid separation in Drosophila neuroblasts.
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.
What is being separated during anaphase of mitosis?
During anaphase, each pair of chromosomes is separated into two identical, independent chromosomes. The chromosomes are separated by a structure called the mitotic spindle. … The separated chromosomes are then pulled by the spindle to opposite poles of the cell.
What separates during anaphase of mitosis quizlet?
Sister chromatids separate during anaphase.
What happens during prophase in mitosis?
Prophase is the first phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses.
What causes mitosis?
Mitosis is a process where a single cell divides into two identical daughter cells (cell division). 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.
Which of the following occurs during mitosis?
During mitosis, when the nucleus divides, the two chromatids that make up each chromosome separate from each other and move to opposite poles of the cell. Mitosis occurs in four phases: prophase, metaphase, anaphase, and telophase.
Do sister chromatids separate during mitosis?
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.
Which of the following does not occur during mitosis?
Explanation: Crossing over is the only answer choice that does not occur during mitosis. Crossing over occurs during prophase I of meiosis and involves swapping of genetic information between homologous chromosomes.
Does mitosis involve separation of sister chromatids?
During mitosis, homologous chromosomes are not separated, only the sister chromatids. Both processes involve the breakdown of the nuclear envelope, allowing DNA to enter the cytoplasm and align at the equatorial plate and both processes involve separation of sister chromatids.
What events occur during prophase?
The main events of prophase are: the condensation of chromosomes, the movement of the centrosomes, the formation of the mitotic spindle, and the beginning of nucleoli break down.
Which of the following events occurs during telophase of mitosis?
Telophase is technically the final stage of mitosis. Its name derives from the latin word telos which means end. During this phase, the sister chromatids reach opposite poles. The small nuclear vesicles in the cell begin to re-form around the group of chromosomes at each end.