I couldn’t get my act together to finish a paper write-up early in the week – holidays and then busy in lab, plus it’s about 4 papers (!) instead of the normal 1 – so enjoy these anecdotes from Information Processing:
WSJ: … When the great California Institute of Technology geneticist Seymour Benzer set out in the mid-1960s to find mutations in fruit flies that affected behavior, rather than mere anatomy, he was ridiculed for challenging the consensus that all behavior must be learned.
Benzer told the geneticist Max Delbrück about the plan to find behavioral mutants; Delbrück said it was impossible. To which Benzer replied: “But, Max, we found the gene, we’ve already done it!” (Benzer’s mother was more succinct: “From this, you can make a living?”) He was soon able to identify mutations related to hyperexcitability, learning, homosexuality and unusual circadian rhythms, like his own: Benzer was almost wholly nocturnal.
Since then, thanks to studies of human twins and a rash of genetic investigations in animals, it has become routinely accepted that most things, including personality, sexual orientation and intelligence, are to some degree affected by genes. The University of Virginia’s Eric Turkheimer has declared what he calls the “first law of behavior genetics”: that all human behavioral traits are heritable.
He’s got a lot of good stuff there, read it all!