How many genes are needed to sustain an organism? As Carl Zimmer notes in the New York Times that number may be surprisingly small and, ultimately, irrelevant.
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Differences in DNA methylation could be used to distinguish between DNA samples obtained from identical twins, researchers say.
A retrovirus that's been integrated into the human genome appears to have a role in embryonic development, researchers report.
A report from MIT identifies areas of scientific research where declining research support is hindering needed advances.
In PLOS this week: phylogenetic study of hepatitis E viruses in Swedish moose, recombination sites in the honeybee genome, and more.