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Hybrid male sterility genes in the mouse subspecific crosses
Abstract and Figures
Pure species have of course their organs of reproduction in a perfect condition, yet when intercrossed they produce either few or no offspring. Hybrids, on the other hand, have their reproductive organs functionally impotent, as may be clearly seen in the state of the male element in both plants and animals.
Figures - uploaded by Jaroslav Piálek
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