The Google Doodle today features Nettie Stevens for what would've been her 155th birthday. As Vox writes, Stevens uncovered the connection between the Y chromosome and maleness by studying mealworms. "Thanks to Stevens's work — and the work that built upon it — we now know that sex is hereditary, and that dads' sperm in particular determine the sex of offspring," it adds.

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Microsoft co-founder Paul Allen also contributed to brain research, NPR reports.

The New York Times reports on the shifting interpretations of what some genetic variants mean over time.

In Cell this week: investigation of metastatic tumor evolution, more than 16,000 genetic variants introduced into the budding yeast model organism, and more.

MIT's Technology Review reports on Genentech's pursuit of personalized cancer vaccines.