The Separation of Sister Chromatids and Homologous Chromosomes

Cohesin

protein that holds chromatids together, is key to the behavior of chromosomes in mitosis and meiosis.

________ is another type of structural maintenance of chromosome complex, related to condensins and structural maintenance of chromosomes help bring about chromosome condensation in eukaryotes and chromosome segregation in bacteria

Cohesion

Cohesin has a ____ structure that encircles and hold together the sister chromatids

ring-like

Cohesin is loaded onto the chromosome in the ______ phase and persistis through _____ and early mitosis

S phase and G2

In anaphae of mitosis, cohesin along the entire legth of the chromosome is ______ by an enume called ______, allowing the sister chromatid separate

broken down / separase

Cohesin controls the ______ of chromatids and chromosomes in mitosis and meiosis

separation

In mitosis, cohesin along the chromosome breaks down in _________, but cohesin remains at the _____, keeping sister chromatids together until ______.

anaphase I / centromere / anaphase II

In anaphase I, cohesin long the chromosome arm is broken, allowing the ___________

2 homologs to separate.

Cohesin hold ___________ together during early part of mitosis

sister chromatids

In ______ cohesin breaks down, allowing sister chromatids to separate

anaphase

In meiosis, cohesion is protected at the ________ during anaphase I, so homologous chromosomes. but not sister chromatid, separate in meiosis I.

centromeres

The breakdown of centromeric cohesin allows _______ to separate in anaphase II of meiosis

sister chromatids