During anaphase, sister chromatids separate and the centromeres divide. The sister chromatids are pulled apart by the shortening of the spindle fibers.
What process allows for sister chromatids to pull apart during anaphase?
During anaphase, the centromeres of each chromosome split and the mitotic spindle pulls the sister chromatids apart.
What causes the sister chromatids to separate during anaphase?
What Happens during Metaphase and Anaphase? … 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 happens to sister chromatids during anaphase quizlet?
What happens to sister chromatids during anaphase? They chromatids are pulled apart to opposite poles of the cell.
Which cell is an example of anaphase?
For example, a human somatic cell has 46 chromosomes. During anaphase when the chromatids are separated and pulled to opposite poles, the cell momentarily has 92 chromosomes, because these chromatids are classified as distinct chromosomes.
Why do sister chromatids remain together in anaphase I separate in anaphase II of meiosis?
Briefly explain why sister chromatids remain together in anaphase I but separate in anaphase II of meiosis. … At the end of metaphase II, the protection of the cohesin molecules at the centromeres is lost, and the separase proteins can now cleave the cohesin complex, which allows the sister chromatids to separate.
What happens if sister chromatids fail to separate in mitosis?
Also, chromosomes don’t always separate equally into daughter cells. This sometimes happens in mitosis, when sister chromatids fail to separate during anaphase. One daughter cell thus ends up with more chromosomes in its nucleus than the other.
Do histones hold sister chromatids together?
Chromosomes are packaged by histone proteins into a condensed structure called chromatin. … Sister chromatids are held together by proteins at a region of the chromosome called the centromere.
What is the role of sister chromatids?
The sister chromatid cohesion apparatus mediates physical pairing of duplicated chromosomes. This pairing is essential for appropriate distribution of chromosomes into the daughter cells upon cell division.
Do sister chromatids separate during meiosis?
Meiosis II is the second division of meiosis. It occurs in both of the newly formed daughter cells simultaneously. Meiosis II is similar to Mitosis in that the sister chromatids are separated.