1 Department of Evolution and Ecology, University of California, Davis, CA, USA. cveller@ucdavis.edu.
2 Center for Population Biology, University of California, Davis, CA, USA. cveller@ucdavis.edu.
3 Center for Reproductive Medicine, Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Key Laboratory of Reproductive Endocrinology of Ministry of Education, Jinan, China.
4 Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette Cedex, France.
5 Advanced Medical Research Institute, Shandong University, Jinan, China.
6 State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China.
7 Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA, USA. kleckner@fas.harvard.edu.