MCB 150 Lecture Notes - Lecture 14: Sister Chromatids, Heterochromatin, Euchromatin
20 Feb 2017
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Found in periphery of the nucleus and in pockets elsewhere in the cell. As the cell enters mitosis, chromatin must condense further. When they split, they form two chromosomes. Identify as the end of the molecule so it won"t get modified. They are single-stranded molecules complementary to each other. They are similar double helical molecules, but not identical since one came from the mother and the other from the father. They are identical double helical molecules attached to each other. There are no sequence relationships between them, but they are approximately the same size and therefore linked to each other. Homologous chromosomes = 1 from mom and 1 from dad, each one has. Naked dna is not actually considered chromatin because it does not have proteins. 20,000 more times packed at the end. Information content of dna resides in the sequence of its bases. If chain has 2 nucleotides, 4 ** 2. If chain has 3 nucleotides, 4 ** 3.
