The genetic similarity (or homology) of superficially dissimilar species is amply demonstrated here
The full complement of human chromosomes can be cut, schematically at least, into about 150 pieces (only about 100 are large enough to appear in this illustration), then reassembled into a reasonable approximation of the mouse genome. The colors of the mouse chromosomes and the numbers alongside indicate the human chromosomes containing homologous segments. This piecewise similarity between the mouse and human genomes means that insights into mouse genetics are likely to illuminate human genetics as well.
This image is linked to the following Scitable pages:
Scientists now have the ability to sequence complex genomes from multicellular organisms. Does the genome size correlate with the complexity of the organism? The answer is surprising.
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