What percentage of DNA do we share with octopuses? I tried looking it up but couldn't find the answer on the internet. Could someone enlighten me on the same? To make the question more specific, I am more interested in knowing how many genes humans share with octopuses, but answers regarding how different our shared genes are or even a metric of the entire genome alignment would be helpful.
Octopuses have more chromosomes and genes
Octopuses had an expansion of genes in only a few protein families
There is a large number of C2H2 zinc-finger proteins (C2H2 ZNFs) (~1800), interleukin-17-like genes (IL17-like), G-protein-coupled receptors (GPCRs), chitinases and sialins paralogues in the octopus genome.
However, there does not exist a comprehensive analysis of orthologous proteins in the octopus that I can find. This means that although we can say that there are thousands of genes we only observe in octopuses, there is currently no study comparing orthologues that exist in both humans and octopuses.