Mouse produced from 2 males

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Big Don

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Except, they didn't really create life from two males with no female involvement...
The researchers took these X-only (or "XO") cells and injected them into normal mouse embryos, which they then implanted in a surrogate mother mouse. The resulting baby mice were chimeras, or organisms with several distinct populations of cells. About half of the mice were female chimeras with some XX cells (which came from the normal embryo) and some XO cells, which contained DNA from Father No. 1.
When the female chimeras reached adulthood, the researchers mated them with regular male mice. Some of the females' egg cells derived from the XO cells. Those cells contained DNA from Father No. 1 only, so when the female chimeras mated with another male - Father No. 2 - some of the offspring thus had an X chromosome from Father No. 1 and either an X or Y chromosome from Father No. 2.
 

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