How a Pea Aphid Decides to Make Wings or Not
How a Pea Aphid Decides to Make Wings or Not
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.
How a Pea Aphid Decides to Make Wings or Not
How a Pea Aphid Decides to Make Wings or Not

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.

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.

sex chromosome
Infographic: How Some X-Chromosome Genes Escape Inactivation
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
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
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
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.
Researchers Develop New Method for Sexing Sperm
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.
Why Is Cancer More Common in Men Than in Women?
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
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
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
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
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
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
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
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
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
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
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.
Long Live the Y
Megan Scudellari | Feb 22, 2012
Despite suggestions to the contrary, the Y chromosome is not necessarily rotting away.