BIO 111 Lecture Notes - Lecture 15: Karyotype, Centromere, Polyploid
Document Summary
G1, g2, s, interphase. completion of replication cell division. Mitosis is chromosome condensation and sister chromatid formation. Centrosomes move away from each other as the mitotic spindle starts to form two sister chromatid= two pairs of socks. Prophase- centrosomes move to different sides of the cell, and microtubules begin to create in order to split the chromosomes. Prometaphase- fragmentation of the nuclear envelope creates easy entry points for the microtubules. Kinetochore forms on chromatids and becomes bound by microtubules is specialized and what the microtubule attaches to. Mitotic spindle- formed by the end of prometaphase. Two centrosomes- mt organizing center at each pole. Non-kinetochore mts will push the cell to elongate pushes against each other and forces the cell to start to split. Asters are the small mts that anchor the pole for the centrosomes each half sister chromatid is attached to a different pole.
