GEN-3000 Lecture 11: 11 – Chromosome Structure & DNA Sequence Organization
21 Oct 2020
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Note that the phages are magnified about five times more than the d n a: electron micrograph of bacteriophage t2, which has had its d n a released by osmotic shock. 2: electron micrograph of the bacterium e. coli, which has had its d n a released by osmotic shock. The chromosome is 1200 m long: bacterial chromosomes, circular, double-stranded dna compacted into nucleoid, e. coli most extensively studied has 1. 2 mm of chromosome in length, bacterial dna associated dna binding proteins. 4: gene repetition seldom present, replication of mtdna depending on enzymes coded by nuclear. 5: not usually found in eukaryotic cells, light microscopy revealed chromomeres individualized bands, polytene chromosomes derived from larval salivary gland cells of. The diagram depicts the uncoiling of strands within a band (b) region to produce a puff (p) in polytene chromosomes. 6: lampbrush chromosomes, meiotic chromosomes first studied in oocytes of sharks, large with extensive dna looping, lampbrush chromosomes derived from amphibian oocytes.
