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Inheritance of Midpiece Length in Mouse Spermatozoa

Abstract

INBRED strains of mice are known to differ in such aspects of spermatozoan morphology as the size and shape of the head and midpiece1–3. When inbred4 or outbred5 strains are crossed, clear patterns of inheritance of spermatozoan characteristics emerge. The first heritability estimates for characteristics of mammalian gametes were obtained by Napier6 from son–sire regressions in the rabbit: for example, h2 = 0.72 ± 0.18 for length of the spermatozoan head, and estimates of similar magnitude for its width and projected area. These investigations show in general7 that genetic effects on the spermatozoan phenotype are paramount and environmental effects seem relatively unimportant.

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WOOLLEY, D., BEATTY, R. Inheritance of Midpiece Length in Mouse Spermatozoa. Nature 215, 94–95 (1967). https://doi.org/10.1038/215094a0

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