The earliest identified intercourse chromosomes have been present in an octopus species native to the Pacific Ocean. These chromosomes advanced as much as 380 million years in the past, and they’re the primary proof of genetic intercourse willpower in cephalopods – a gaggle that features squid, cuttlefish, octopuses and nautiluses.

“Cephalopod intercourse willpower has been an entire thriller up so far,” says Andrew Kern on the College of Oregon. Researchers have lengthy thought that cephalopod intercourse is decided by environmental elements, akin to temperature. However Kern and his…