Researchers have discovered ancient chromosomes preserved in a 52,000-year-old woolly mammoth. "Fossil chromosomes are a game-changer."
Cell biologists describe a new organelle, the exclusome, that's present in mammalian cells and made of rings of DNA.
"We knew we had an incomplete picture up until now, but we can now see the entire genome from end to end for the first time."
For one species of butterfly, a vision gene's jump onto a sex chromosome explains why males and females see color differently.
A new study with worms suggests one reason reproduction slows with age: a decline in the ability to repair broken DNA strands.
New research with a kind of softshell turtle could clarify the function of sex chromosomes in a vast number of organisms, say researchers.
The first complete mapping of the genome of the quirky duck-billed platypus reveals how it got so strange.
New research indicates rapid evolution in some great ape Y chromosomes, but not others. The scientists wonder if mating habits are why.
The discovery that fruit fly brains add chromosomes as an anti-aging defense may help answer questions about human age-related brain disease.
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