Nautiloids—a lineage of ancient, externally-shelled cephalopods that diverged from their octopus and squid relatives over 400 million years ago—once dominated our oceans. Subscribe to our newsletter ...

Cephalopods may have the oldest sex chromosomes of any animal, according to a new discovery in the octopus genome. That's a big deal given that scientists didn't know until now if these oddball ...

Sex determination in dioecious plants, where male and female functions are segregated into distinct individuals, is governed by a remarkable diversity of genetic and developmental mechanisms. Recent ...

In several systems, two sex genes are detected, but they control different steps of the same pathway that are regulated by a single master gene. In some of the classic fish systems, like platyfish, ...

Add Yahoo as a preferred source to see more of our stories on Google. Researchers from the University of Oregon have solved a longstanding biological mystery: octopuses utilize a specific chromosome ...

Subscribe to our newsletter for the latest sci-tech news updates. Sex determination is a cornerstone of biology, yet many mysteries remain about how sex chromosomes evolve, especially outside familiar ...

Stephen has degrees in science (Physics major) and arts (English Literature and the History and Philosophy of Science), as well as a Graduate Diploma in Science Communication. Stephen has degrees in ...

Most species on Earth exist as two biological sexes, and the exchange of genes between males and females is vital for their survival. Yet, what actually determines whether an individual develops into ...

The determination of biological sex turns out to be a complicated matter, even if we restrict the discussion to vertebrates. Sex determination in mammals depends on a pair of chromosomes, known as the ...

In humans and other animals, sex is usually determined by a single gene. However, there are claims that in some species, such as platyfish, it takes a whole “parliament” of genes acting together to ...