Newly Sequenced Giant Squid Genome Raises as Many Questions as It Answers

The scientists also identified genes responsible for growth and development, namely the Hox and Wnt genes. These genes might play a role in this animal’s gigantism, as individuals typically grow to between 9 and 13 meters in length (30 to 42 feet). That said, their size doesn’t appear to be the result of whole-genome duplication, an evolutionary growth strategy seen in large-bodied vertebrates.

Wait, what?

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Well, tetraploids do tend to be larger than their diploid ancestors. And DNA content is correlated with cell size. But I don’t see that as corresponding to the major evolutionary strategy by which vertebrates get big. You might look at Gregory’s genome size database if you want actual data.