Kristin writes, “This was a graduation present to myself. It came to me during a genetics lecture and I got it done 3 years later. It goes ankle to mid thigh. I’m a geneticist now and LOVE it. Genetics stole my heart. P.s. It codes for a snippet of an exon from the sonic the hedgehog gene.“
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Originally published February 16, 2008. Copyright 2008 Carl Zimmer.