During anaphase, each pair of chromosomes is separated into two identical, independent chromosomes. … The separated chromosomes are then pulled by the spindle to opposite poles of the cell.
What happens during anaphase 1 in meiosis?
During anaphase I, the homologous chromosomes are pulled toward opposite poles of the cell. During anaphase I, the homologous chromosomes are pulled toward opposite poles of the cell.
What moves towards the poles during anaphase?
More specifically, in the first part of anaphase — sometimes called anaphase A — the kinetochore microtubules shorten and draw the chromosomes toward the spindle poles.
What is the result of anaphase 1?
In anaphase I, the paired homologous chromosomes would separate from each other and move to opposite ends of the cell as the kinetochore microtubules shorten. This stage begins as soon as homologous chromosomes begin separating and ends when the chromosomes arrive at opposite ends of the cell.
What happens in phase 1 during mitosis?
The first and longest phase of mitosis is prophase. During prophase, chromatin condenses into chromosomes, and the nuclear envelope (the membrane surrounding the nucleus) breaks down. In animal cells, the centrioles near the nucleus begin to separate and move to opposite poles of the cell.
Why do sister chromatids stay together in anaphase 1?
During meiosis I, the chromatin condenses as in mitosis and the sister chromatids are held together through a process called cohesion. … Unlike in mitosis, the sister chromatids remain attached at their centromeres by cohesion, and only the homologous chromosomes segregate during anaphase I.
What happens during anaphase II?
During anaphase II, microtubules from each spindle attach to each sister chromatid at the kinetochore. The sister chromatids then separate, and the microtubules pull them to opposite poles of the cell. As in mitosis, each chromatid is now considered a separate chromosome (Figure 6).
What happens during anaphase A and B?
Anaphase consists of two phases, anaphase A and B. During anaphase A, the chromosomes move to the poles and kinetochore fiber microtubules shorten; during anaphase B, the spindle poles move apart as interpolar microtubules elongate and slide past one another.
Where does early anaphase occur?
The first process, termed anaphase A (or early anaphase), occurs with the shortening of the kinetochore microtubules to translocate the chromatids away from the metaphase plate and towards the spindle poles.
What is the importance of anaphase 1?
The separated chromosomes are then pulled by the spindle to opposite poles of the cell. Anaphase ensures that each daughter cell receives an identical set of chromosomes, and it is followed by the fifth and final phase of mitosis, known as telophase.