reproductive system
• 40% of epididymal sperm display normal head shape but tail abnormalities including hook- and U-shaped tails, sperm with shortened and thick tails, and conjoined sperm with hooked-shaped tails fused distally
• however, sperm display forward motility and axial rotation and random active particulate motion is observed in the residual cytoplasm
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• coiled flagella are observed in maturing spermatids and epididymal sperm of mutant mice
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• 35% of round spermatids display ectopic manchette
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• only 24% of offspring produced by intra cytoplasmic sperm injection retain the Krt19tm1Alki allele with the rest losing the neo cassette
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cellular
• 40% of epididymal sperm display normal head shape but tail abnormalities including hook- and U-shaped tails, sperm with shortened and thick tails, and conjoined sperm with hooked-shaped tails fused distally
• however, sperm display forward motility and axial rotation and random active particulate motion is observed in the residual cytoplasm
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• coiled flagella are observed in maturing spermatids and epididymal sperm of mutant mice
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• 35% of round spermatids display ectopic manchette
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