ANTHRO 101 Lecture Notes - Lecture 32: Cell Plate, Interphase, Cytokinesis
Document Summary
During prophase, the chromosomes condense and spindle microtubules form, and the. Prophase = the first phase of mitosis. During prophase (1) duplicated chromosomes coil up and condense, (2) the spindle microtubules form, and (3) the chromosomes are captured by the spindle microtubules. The nucleolus, a structure within the nucleus where ribosomes assemble, disappears. After the duplicated chromosomes condense, the spindle microtubules begin to assemble. In animal cells, the spindle microtubules originate from a region in which a pair of microtubule-containing structures called centrioles is located. During prophase, the centriole pairs move to opposite sides of the nucleus and when the cell divides, each daughter cell receives a pair of centrioles. Each centriole pair serves as a central point from which the spindle microtubules radiate, both inward and toward the nucleus and outward toward the plasma membrane these poles are called spindle poles. But centrioles are not always required for spindle formation.
