2,467 results
2,467 results for: mutations
- Health & Medicine
Split Ends: Cancers follow shrinkage of chromosomes’ tips
Genetic tabs called telomeres, which normally protect the ends of chromosomes, become undersized in many tissues that later turn cancerous, new studies in people show.
- Health & Medicine
Metal’s Mayhem: Cadmium mimics estrogen’s effects, thwarts DNA repair
Cadmium causes endocrine disruption by mimicking estrogen in rats and also thwarts routine DNA repair, causing mutations, two studies show.
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Down the Tubes: Amino acid proves key to plant reproduction
An amino acid that human brain cells communicate with also has a role in plant sex.
- Anthropology
New World Newcomers: Men’s DNA supports recent settlement of the Americas
New data on genetic differences among the Y chromosomes of Asian and Native American men support the notion that people first reached the Americas less than 20,000 years ago.
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Probing Ocean Depths: Photosynthetic bacteria bare their DNA
Scientists have deciphered the DNA of two highly abundant, photosynthetic ocean bacteria.
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Livers: Better late than never
Drawing on an ancient Greek myth, researchers have given the name prometheus to a mutant strain of zebrafish that appear to have no liver early in their lives.
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The Naked Truth? Lice hint at a recent origin of clothing
A study of genetic differences among human lice hints at the origin of clothing.
- Health & Medicine
Zealous Adherence: Erratic HIV therapy hasn’t fueled resistance
Among people infected with HIV, those who don't consistently take their antiretroviral drugs as prescribed are no more likely to develop drug-resistant HIV than are patients who adhere to their treatment schedule.
- Health & Medicine
Damage Patrol: Enzyme may reveal cancer susceptibility
People with lung cancer show less DNA-repair activity by a certain enzyme than people without the disease do.
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Letting the Dog Genome Out: Poodle DNA compared with that of mice, people
Biologists have deciphered the DNA sequence of a poodle, an accomplishment that may help researchers study more than 300 human diseases that also affect dogs.
- Earth
Volcanic Legacy: Tortoises chronicle eruption in their genes
An ancient volcanic eruption in the Galápagos Islands left its legacy in the diminished genetic diversity of one subspecies of the archipelago's famed giant tortoises.
- Anthropology
Y Trail of the First Americans: DNA data point to late New World entry
Scientists identified a gene variant on the Y chromosome that allowed them to estimate that people first reached the Americas no earlier than about 18,000 years ago.
