(IMAGE)

American Association for the Advancement of Science (AAAS)

Caption

Male mouse lacking any Y chromosome genes, 2 years 1 month old. This material relates to a paper that appeared in the Jan. 29, 2016 issue of <i>Science</i>, 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."

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Amanda Shell

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