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You’ve heard a lot about CRISPR technology to manipulate gene expression. But what have scientists actually learned? Well, the cells in which DNA is manipulated could come from different animal models, including frogs and mice. These model systems are used to track brain development, sex differences, and the downstream effects of convergence of genetic manipulations of autism relevant genes on brain cells. They can be used, as one study demonstrated, to examine protective or resilience factors in the brain. This week we talk to Helen Willsey, PhD, at UCSF to hear about her research about manipulating genes in frog eggs and what it says about the female protective effect.