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Where Have I Seen This Before?

In a new study in Current Biology, researchers have found that it's fairly common for multiple mutations to happen at once in DNA, says Scientific American's Steve Mirsky. In a podcast detailing the study, Mirsky says the researchers explored the genomes of various mutlicellular organisms, from yeast to humans, and found that about 3 percent of all mutations are actually mutiples. "A likely explanation is that some polymerase enzyme is particularly prone to errors when it's weaving a strand of DNA," Mirsky adds. The multiple mutations could allow for a faster rate of evolution, the researchers say.

The Scan

Study Reveals New Details About Genetics of Major Cause of Female Infertility

Researchers in Nature Medicine conducted a whole-exome sequencing study of mote than a thousand patients with premature ovarian insufficiency.

Circulating Tumor DNA Shows Potential as Biomarker in Rare Childhood Cancer

A study in the Journal of Clinical Oncology has found that circulating tumor DNA levels in rhabdomyosarcoma may serve as a biomarker for prognosis.

Study Recommends Cancer Screening for Dogs Beginning Age Seven, Depending on Breed

PetDx researchers report in PLOS One that annual cancer screening for dogs should begin by age seven.

White-Tailed Deer Harbor SARS-CoV-2 Variants No Longer Infecting Humans, Study Finds

A new study in PNAS has found that white-tailed deer could act as a reservoir of SARS-CoV-2 variants no longer found among humans.