I just came across a more "liberal arts friendly" online course on genetics. Also free.
 
Introduction to Genetics and Evolution (Duke Un)
Mohamed Noor
A whirlwind introduction to evolution and genetics, from basic principles to current applications, including how disease genes are mapped and how we leverage evolutionary concepts to aid humanity. It startss October 10th, 10 weeks long, provides a certificate upon completion.
 
Web link: https://www.coursera.org/#course/geneticsevolution