Working with bacteriophages and nematodes, the University of California, Berkeley, molecular biologist uncovered a role for genetic switches in early development.

The near-complete feminization of northern Great Barrier Reef sea turtles has been blamed on climate change.

A proposed mechanism for how bearded dragons with male chromosomes hatch as females at high temperatures

Researchers solve the mystery of 15-year-old mutant ferns with disrupted sex determination.

The amino acids left behind in a human fingerprint can be used to determine whether an individual is male or female.

Sex differences in processing pain; clue in flu vaccine–narcolepsy link found; early antibiotic use affects the gut microbiome; lizard sex determined by genes, then temperature

Researchers find that microRNAs may play a role some of the sexual differences seen in fruit flies.

The finding is the first case of sex determination that does not involve a protein and may one day be a boon to silk manufacturers.

What researchers are learning as they sequence, map, and decode species’ genomes

Two genes from the Y chromosome are sufficient to generate male mice capable of fathering healthy offspring via an assisted reproductive technique.