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Lecture 15

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Biology (Sci)
BIOL 202
Mario Chevrette

Lecture 15 Not all of DNA are equal. A chromosome is split into many parts. The telomere are a specific repeated sequence. A pinched central region of kinetochore and centromere for division. The Content-value Paradox: the lack of correlation between genome size and the biological complexity of an organism. Classes of eukaryotic DNA sequences 1. Unique or single copy DNA sequences, 1-10 copies per genome, 40-70%, 800 to 1200bp long, most of the structural genes 2. Moderately repetitive DNA sequence, 10-100000 copies per genome, 300bp long average, genes for rRNA and ribosomal proteins, transposons 3. Highly repetitive DNA sequences, more than 100k copies per genome, satellites and non- satellite DNAs. Satell
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