chap_13 - Chapter 13, Part I The Eukaryotic Chromosome...

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Unformatted text preview: Chapter 13, Part I The Eukaryotic Chromosome Assignment Chapter 13 problems: 1-4, 8, 13, 17, 27, 30 Chromosome Organelle consisting of DNA and protein necessary for the packaging, replication, and expression of genetic material Chromatid One arm of a metaphase chromosome Chromatin General term describing any complex of DNA and protein found in the nucleus Eukaryotic chromosome components DNA (proportion = 1/3) Eukaryotic chromosome components DNA (proportion =1/3) 6 DNA (total in 1 cell) DCB Histone proteins (proportion = 1/3) Eukaryotic chromosome components Non-histone proteins (proportion = 1/3) Eukaryotic chromosome components Everything else! Proteins involved in transcription RNA processing Transcription factors Proteins involved in replication DNA polymerase Non-histone structural proteins Etc. Fig. 13.4.b 1. Nucleosome 2. Supercoiling 3. Radial loops Each loop is one stretch of supercoiled DNA- forming rosettes 1. scaffold Scaffold-associated regions Chromosome structure (packaging) G-banding with Giemsa dye (DNA stain) Chromosome analysis G-banding is used to locate genes...
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chap_13 - Chapter 13, Part I The Eukaryotic Chromosome...

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