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-