BSC 2023 Lecture Notes - Lecture 12: Spindle Apparatus, Sister Chromatids, Chromatid
Document Summary
Dna is composed of two complimentary strands made up of nucleotides. Chromatin network of fine threads in the nucleus composed of dna and proteins, uncoiled, diffuse during interphase, condenses to form visible chromosome in prophase, not ready to divide. Vehicle by which hereditary info is passed to next generation, chromatin condensed into a compact structure. One of two identical copies of dna making up a duplicated chromosome. Point of attachment for mitotic spindle, where sister chromatids attach. Mitotic spindle microtubule structure that brings about chromosomal movement during nuclear division. Mitotic phase during which chromatin condenses so that chromosomes appear, chromosomes are scattered, nucleus begins to disappear. Mitotic phase during which chromosomes are aligned along the equator of the mitotic spindle. Sister chromatids move toward the poles of the spindle. Sister chromatids are located at each pole, go into chromatin structure, two nuclear envelopes.
