sex chromosome
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 29, 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.