01:119:115 Lecture Notes - Lecture 10: Condensin, Centrosome, Menopause
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15 Oct 2018
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Lecture 10: mitosis: general outline, concept 12. 1, concept 12. 2, chromosomes, mitosis and meiosis, cells need to divide for an organism to grow, repair, and reproduce. The message of life, dna, controls the activities of each cell and passes traits onto the descendants. Condensing through this whole thing becoming chromosomes: find this somewhere on sakai (not on lecture slides, 1. At the simplest level, chromatin is a double-stranded helical structure of dna: 2. Dna is complexed with histones to form nucleosomes. Each nucleosome consists of each histone proteins around which the dna wraps. A chromatosome consists of a nucleosome plus the h1 histone (helps to stabilize nucleosome structure: 5. The nucleosomes fold up to produce a 30-nm fiber: 6. That for(cid:373)s loops a(cid:448)eragi(cid:374)g 300 (cid:374)(cid:373) i(cid:374) le(cid:374)gth: 7. The 300-nm fibers are compressed and folded to produce a 250-nm-wide fiber: 8.
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