Mature sperm
Fine structure of acrosome biogenesis and of mature sperm in the bivalve molluscs Glycymeris sp. (Pteriomorphia) and Eurhomalea rufa (Heterodonta)
... of mature sperm has been used for tracing phylogenetic and taxonomic rela- tionships between species (Popham 1979; Franzén 1983; Jamieson 1987; Rouse and Jamieson 1987; Healy 1995; Hodgson 1986, 1995; Morse ...
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BIOLOGICAL DAMAGE IN THE MATURE SPERM OF DROSOPHILA VIRILIS IN OXYGEN AND NITROGEN WITH DIFFERENT DOSE INTENSITIES OF GAMMA RAYS
... Modifications in the percentages of dominant lethal and translocation damage were not obtained by varying the dose rate of gamma rays in treatments of mature sperm of Dr[r] ...
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THE MUTABILITY OF MATURE SPERM OF DROSOPHILA MELANOGASTER IRRADIATED IN THE FEMALE AND IN THE MALE
... When sperm samples are obtained immediately after virgin 3- and 7-day-old males are irradiated with 4,00Or, the frequency of sex-linked recessive lethal mutations detect[r] ...
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DIFFERENCE IN THE RATIO OF DOMINANT-LETHAL MUTATIONS TO HERITABLE TRANSLOCATIONS PRODUCED IN MOUSE SPERMATIDS AND FULLY MATURE SPERM AFTER TREATMENT WITH TRIETHYLENEMELAMINE (TEM)
... To explain this unusual observation, we postulated that the relative rates at which dominant-lethal mutations and heritable translo- cations are produced from chemical treatment [r] ...
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DUMPY MUTATIONS FOLLOWING X-IRRADIATION OF DROSOPHILA MELANOGASTER MATURE SPERM IN OXYGEN OR IN NITROGEN
... The present study, in which the frequency pattern of X ray-induced dumpy mutations in oxygen or in nitrogen is compared with that of yellow mutations on the scute-8 chromosom[r] ...
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COMPARATIVE MUTAGENESIS OF THE DUMPY LOCUS IN DROSOPHILA MELANOGASTER. I. X-RAY TREATMENT OF MATURE SPERMFREQUENCY AND DISTRIBUTION
... And if the same ratio of about one-third to one-half holds for the incidence of induced mosaic gene mutations at the clot locus to the total of clot gene mutations, then the one [r] ...
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Mutation analysis of TNP1 gene in infertile men with varicocele
... the mature sperm nucleus, probably TNP defected proteins cause abnormal condensation of sperm chromatin, increases sperm DNA strand breaks and immobility of spermatozoa that can lead to male ...
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MODIFICATION OF X-RAY MUTAGENESIS IN DROSOPHILA. I. REUNION OF CHROMOSOMES IRRADIATED DURING SPERMIOGENESIS
... It was thought that irradiation of spermatozoa stored in females should provide us with a more nearly homogeneous sample of mature sperm and that irradiation of pupae accurat[r] ...
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An ultrastructural study of spermatogenesis and sperm morula breakdown inArenicola marina (L.) (Annelida: Polychaeta)
... The cytophore contains endoplas- mic reticulum (er) which suggests active biosynthesis is occurring.. Diagrammatic representation of the distal end of mature sperm flagellu[r] ...
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CYTOLOGICAL ANALYSIS OF X-RAY-INDUCED MUTATIONS AT EIGHT SPECIFIC LOCI IN THE THIRD CHROMOSOME OF DROSOPHILA MELANOGASTER
... The recoverable genetic damage to the mature sperm is higher than that for spermatogonia when the calculations of the mutation rate for mature sperm is based on the total [r] ...
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DOMINANT LETHAL AND INACTIVATION EFFECTS OF NITROGEN MUSTARD ON HABROBRACON SPERM
... Since mature males, either unmated or kept from females for several days, were exposed to nitrogen mus- tard, an ample supply of mature sperm must have been present at time[r] ...
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REVERSE MUTATION STUDIES ON THE FORKED LOCUS IN DROSOPHILA MELANOGASTER
... Following irradiation of mature sperm, none of the four f alleles tested on an extensive scale gave rise to induced ff reversals, whereas one particular allele, f””, pro[r] ...
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Putative molecular mechanism underlying sperm chromatin remodelling is regulated by reproductive hormones
... of sperm with abnormal nuclear shapes [50]. When mature caput sperm of CPA-treated rats were treated with DTT in vitro , ultrastructural studies demonstrated swollen nuclei which had burst as ...
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Pharmacological inhibition of EZH2 disrupts the female germline epigenome
... The developing germline plays a central role in regu- lating epigenetic information transmitted by gametes to offspring. To ensure transmission of appropriate epigenetic information to offspring, epigenetic infor- mation ...
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DOSE RATE EFFECTS IN THE DEVELOPING GERM CELLS OF MALE DROSOPHILA
... ENETIC damage was not modified by variations in the dose rate of radiation when mature sperm of Drosophila were treated (MULLER 1940), nor were changes in the rate or in the frac[r] ...
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Original Article Chromosome aberrations and spermatogenic disorders in mice with Robertsonian translocation (11; 13)
... of mature sperm was ...of mature sperm in Rob translocation (11; 13) mice. Abnormal sperm and reduced number of sperm may be one of the main reasons for reproductive decline and ...
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Comparing Seminal Plasma Biomarkers between Normospermic and Azoospermic Men
... with sperm count (p < ...of mature sperm in testicular biopsies (p < ...with sperm count in the normo- spermic group, however, NαG concentration correlated with sperm count of ...
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INDUCED LOSS OF A RING AND A TELOMERIC CHROMOSOME IN DROSOPHILA MELANOGASTER
... If dominant lethality in mature sperm is a function of the chromosome breakage induced, then with equal breakage more dominant lethality might be expected in the ri[r] ...
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X-RAY INDUCED VISIBLE MUTATIONS IN HABROBRACON OOCYTES
... mutations induced in oocytes, make it obvious that differences in sensitivity between eggs in early meiotic stages and mature sperm need not be attributed to cytoplasm in on[r] ...
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HBA as a Potential Alternative to the TUNEL Assay for Assessment of DNA Integrity in Asthenozoospermic Spermatozoa
... viable mature sperm in a fresh semen ...oocyte. Sperm binds to hyaluronan only after it completes its plasma membrane remodeling, cytoplasmic extrusion and nuclear maturation, because hyaluronic acid ...
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