image: This is a male mouse lacking any Y chromosome genes (white) and his offspring, created with an assisted reproduction technique called round spermatid injection (ROSI). This material relates to a paper that appeared in the Jan. 29, 2016 issue of Science, published by AAAS. The paper, by Y. Yamauchi at University of Hawaii in Honolulu, HI, and colleagues was titled, "Two genes substitute for the mouse Y chromosome for spermatogenesis and reproduction." view more
Credit: Yasuhiro Yamauchi