mixing blue and pink smoke, symbolic of the muddled boundaries between sexes
Opinion: Biological Science Rejects the Sex Binary, and That’s Good for Humanity
Evidence from various sciences reveals that there are diverse ways of being male, female, or both. An anthropologist argues that embracing these truths will help humans flourish.
ABOVE: © ISTOCK.COM, brightstars
Opinion: Biological Science Rejects the Sex Binary, and That’s Good for Humanity
Opinion: Biological Science Rejects the Sex Binary, and That’s Good for Humanity

Evidence from various sciences reveals that there are diverse ways of being male, female, or both. An anthropologist argues that embracing these truths will help humans flourish.

Evidence from various sciences reveals that there are diverse ways of being male, female, or both. An anthropologist argues that embracing these truths will help humans flourish.

ABOVE: © ISTOCK.COM, brightstars

sex chromosome

babies
Sex Ratios at Birth Linked to Pollutants
Chloe Tenn | Dec 3, 2021
A large, long-term study across the US and Sweden finds potential correlations between specific pollutants and the proportions of male and female babies born.
How a Pea Aphid Decides to Make Wings or Not
Viviane Callier | Jun 1, 2020
Wing development in females is environmentally controlled, but in males, an insertion on the sex chromosome appears to dictate whether the insects grow wings, according to a study.
Infographic: How Some X-Chromosome Genes Escape Inactivation
Amber Dance | Mar 1, 2020
About one-quarter of the hundreds of genes on the inactivated X chromosome in XX cells manage to escape that silencing, at least some of the time.
Genes that Escape Silencing on the Second X Chromosome May Drive Disease
Amber Dance | Mar 1, 2020
When X-linked genes evade silencing on the “inactive” chromosome in XX cells, some protect women from diseases such as cancer, but others seem to promote conditions such as autoimmunity.
Switch Master: A Profile of Barbara Meyer
Diana Kwon | Jan 13, 2020
Working with bacteriophages and nematodes, the University of California, Berkeley, molecular biologist uncovered a role for genetic switches in early development.
Unbalanced Chromosomal Inheritance More Common than Thought
Jef Akst | Oct 11, 2019
A genomic analysis from 23andMe suggests that people inherit two copies of a chromosome from only one parent nearly twice as often as researchers had realized.
sperm mouse sex selection ivf in vitro fertilization x y chromosome
Researchers Develop New Method for Sexing Sperm
Katarina Zimmer | Aug 13, 2019
Scientists found they could sort mouse sperm prior to IVF by treating semen with a drug that selectively slows down X-bearing cells.
cancer more common in men
Why Is Cancer More Common in Men Than in Women?
Jef Akst | Apr 1, 2019
The molecular processes that lead males to be more susceptible to the disease are only beginning to come to light.
X Marks the Sex-Skewed Spot
Rina Shaikh-Lesko | Mar 7, 2016
Alterations in epigenetic markers on the X chromosome may be why males outnumber females among murine offspring bred through in vitro fertilization.
Lizard Swaps Mode of Deciding Its Sex
Kerry Grens | Jul 1, 2015
Sex assignment in bearded dragons can flip from one based on chromosomes to one driven by temperature, researchers report.
Lost Y Chromosome Genes Found on Autosomes
Anna Azvolinsky | May 27, 2015
Mammalian Y chromosome genes with important functions are transferred to autosomal chromosomes more often than previously thought, a study shows.
Doris Bachtrog: Sex Chromosome Wrangler
Molly Sharlach | Jan 1, 2015
Associate Professor, Department of Integrative Biology, University of California, Berkeley. Age: 39
Focus on Sex
Molly Sharlach | Dec 28, 2014
In 2014, new research findings and guidelines brought increased attention to biological differences between males and females.
Vanishing Y Chromosomes
Molly Sharlach | Dec 4, 2014
A new study reveals an association between smoking and rates of Y chromosome loss in blood cells, which may explain elevated cancer risk among male smokers.
Female Pigs May Sense Sex of Sperm
Anna Azvolinsky | May 21, 2014
The oviducts of pigs exhibit different gene expression profiles depending on their exposure to sperm with either an X or a Y chromosome, a study shows. 
The Surprising Evolution of Sex Determination
Rina Shaikh-Lesko | Apr 23, 2014
A detailed analysis of sex chromosomes finds unexpected evolution of functional Y chromosome genes across species.
Week in Review, July 22–26
Jef Akst | Jul 26, 2013
Faux stem cells; X chromosome involved in sperm production; rewarding peer review; clues to flatworm regeneration; an ethereal glow signals death
X Marks the Spot for Sperm Production
Chris Palmer | Jul 21, 2013
A new genetic analysis suggests the human X chromosome evolves rapidly and plays a specialized role in sperm production.
Sex Drives Chromosome Evolution
Ruth Williams | Jul 19, 2012
A relatively new pair of sex chromosomes in the fruit fly allows researchers to track their evolution from the beginning.