Sentence examples for generation of sperm from inspiring English sources
Once sexually mature, a male's seminiferous tubules begin spermatogenesis, that is, the generation of sperm.
Mechanisms used by Wolbachia range from killing of male offspring or induction of parthenogenesis to more subtle manipulations such as generation of sperm-egg incompatibilities, called cytoplasmic incompatibility (CI) [5] [8].
In mammals, in any single zone along a tubule, all sperm are at the same stage of maturation; adjacent zones contain different generations of sperm, and a period of sperm formation and discharge is followed by an interval of inactivity.
These results hint at a function of H3K79 methylation in the generation of fertile sperm.
Based on the generation of the sperm DNA-free bimaternal mice mentioned above, a proper imprinting state of Igf-2-H19 anDlk1-Gtl2l2 loci seems to be crucial for initiating proper embryogenesis.
It has been hypothesized that Chlamydial infection may impair fertility through the generation of anti-sperm antibodies (ASA) as a part of the inflammatory response, which in turn may impair sperm migration and/or block sperm-ovum interaction [ 33– 33].
As expected from earlier work in Xenopus and sea urchin eggs [24], [25], preinjection of A. aranciacus eggs with heparin severely affected the generation of the sperm-induced Ca2+ signals but did not completely block them.
Our findings identify important roles for subplasmalemmal actin fibers in the process of sperm-egg interaction and in the subsequent events related to fertilization: the generation of Ca2+ signals, sperm penetration, cortical granule exocytosis, and the block to polyspermy.
The remainder of cases are caused by random chromosomal deletion during fetal development or during the generation of eggs and sperm.
On the other chromosomes, selection is more focused on individual genes because chunks of DNA are swapped between the members of each pair of chromosomes before the generation of eggs and sperm.
We searched for unknown conserved features in chromatin reorganization crucial for the generation of mature fertile sperm in Drosophila and rat.
