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The significance of the fitted model was assessed using ANOVA with type III sums of squares tested with an analysis of deviance on a χ 2 distribution using the R package car S6although there was considerable variation among males and between tests. This study shows that although the first mature sperm occur in the tubular lumen after about 5 d, they occur in the efferent duct only after 6—7 d. HD Porr HD cumshots svälja sperma. S3 and SI Materials and Methods for detailsand hence sperm collected from the outer edges of the droplet will show phenotypic overlap with LAT sperm Fig. DePristo MAet al.

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All data with Gaussian error distribution e. Although haploid selection is well established in plants, current dogma assumes that in animals, intact fertile sperm within a single ejaculate are equivalent at siring viable offspring. We found no systematic evidence of transmission bias Fig. To measure sperm velocity, males were kept in groups of brothers without females overnight before the measurements. You May Also be Interested in. Because we collected three subsamples from each male, the first sample will contain only the most mature sperm stored in the efferent duct, and the last sample will contain younger sperm coming from the tubular lumen of the testes.

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