(1) Early diagnosis, high rate of survival of light-for-date babies and babies with congenital heart defect, and, possibly, exogenous factors working on gametogenesis might be an explanation.
(2) These data show that spectrin is present in all stages of gametogenesis and embryogenesis, except in mature spermatozoa; and that it undergoes cytoplasmic redistribution during morphogenesis.
(3) Mutations at the white spotting locus (W) affect various aspects of hematopoiesis, melanogenesis and gametogenesis during development and in the adult animal.
(4) A possible chromosome segregation disturbance in gametogenesis due to senescent changes of heterochromatic regions is discussed.
(5) In males, both plasma T and 11-KT initially increased in November and then showed further increasings during the rest of the period of gametogenesis (December) to reach their peak levels in the first half of the spawning period (end of January).
(6) If the right to gametogenesis is restricted, then every replicator symbiont and nuclear genome alike and hence every cell of the developing embryo, will have an incentive to compete.
(7) Males cultured for several years at 18 degrees C expressed a stable sexual phenotype when induced to undergo gametogenesis; males remained male.
(8) Synchronous gametogenesis in the water mold Allomyces arbuscula is blocked by actinomycin D added at the onset of the process.
(9) Sl and W mutations affect the same cellular targets in melanogenesis, gametogenesis and hematopoiesis during embryonic development and in adult life.
(10) These results are considered as nonrandom in pathology of male gametogenesis.
(11) for 21 days led to insignificant changes of plasma FSH, LH, PRL and T along with unaltered activities of testicular delta 5-3 beta-HSD, 17 beta-HSD activities and gametogenesis.
(12) Temperature shift experiments and antibiotic studies have indicated that this gene is expressed within 6 hr after the onset of gametogenesis in liquid culture, and its product has a lifetime of about 4 hr at 35 degrees.
(13) Fundamental animal studies by pioneers, such as Chang, Thibault and Edwards, taught us nature's axioms for gametogenesis, fertilization, development and differentiation.
(14) Northern blot analysis revealed that steady-state levels of the 2.4-kilobase GLE mRNA increased during growth and mitotic cell division in the vegetative cell cycle and also increased markedly during gametogenesis under nitrogen-starved conditions.
(15) Thus, it appears that the processes of hematopoiesis, melanogenesis, and gametogenesis in mammals involve a similar strategy to that used in other species for transmitting and receiving positional cues during development.
(16) In nearly all animals, the regulation of germinal cell development is postulated to be mediated through the control of gonadal somatic cell functions, associated with the creation and maintenance of an optimal milieu within the spermary of seminiferous tubule in which gametogenesis takes place.
(17) During gametogenesis RNA is de novo synthesized and becomes associated with the polyribosomes.
(18) Reproduction is a complex, stepwise series of processes that begins with gametogenesis, continues through gamete interaction, implantation, embryonic development, growth, parturition, and postnatal adaptation, and is completed with the development and sexual maturation of the newly formed organism.
(19) In this study, the patterns of expression of inhibin alpha-subunit mRNA during mouse gametogenesis were examined by RNA blot, cytoplasmic dot and in situ hybridization techniques.
(20) The relationship between allophanate lyase induction and gametogenesis is discussed.
Oogenesis
Definition:
(n.) The development, or mode of origin, of the ova.
Example Sentences:
(1) During oogenesis in many animals there is a massive extrachromosomal synthesis of the genes for ribosomal RNA.
(2) The distribution of these molecules has been studied during oogenesis and during early post-fertilization development.
(3) By applying a number of quantitative nucleic acid hybridization procedures to both total and fractionated oocyte and somatic DNA, employing both homologous and heterologous U snRNA gene probes and suitable amplification and non-amplification control probes, we show that the U snRNA genes do not undergo any major amplification in Xenopus oogenesis.
(4) We assume that the relative content of 5S rRNA fractions reflects the proportion between ribosomes synthesized during oogenesis and those synthesized in embryos and larvae.
(5) The temperature-sensitive Drosophila developmental mutation, l(3)c21RRW630 (abbreviated RW630) disturbs oogenesis and has a maternal effect on embryogenesis.
(6) As the oocyte grows the amount of DNA in it increases rapidly, but at the end of oogenesis the increase in the amount of DNA lags considerably behind the rate of increase in the volume of the oocyte.
(7) The shorter cyclin B transcript alone is then detectable in the presumptive oocyte until stages 7-8 of oogenesis.
(8) Our results indicate that no significant differences exist in the rate of protein synthesis among any of the stages of oogenesis investigated.
(9) 6) Significant, lower frequencies of structural chromosome anomalies were observed irradiating earlier stages of mouse oogenesis.
(10) Eight stages in the oogenesis of Dermogenys pusillus were selected in order to demonstrate the formation of the egg membrane.
(11) The tudor (tud) locus of Drosophila melanogaster is required during oogenesis for the formation of primordial germ cells and for normal abdominal segmentation.
(12) The stages of embryogenesis of Polypodium closely correspond to stages of the host oogenesis.
(13) It is shown that E2-17 beta MCR changes significantly during the progress of oogenesis, mainly at the end of the sexual cycle.
(14) This treatment resulted in developmental retardation which was manifested in a number of ways: at the age of 30 days, the weight of the body was well as spleen, testes and particularly thymus was significantly reduced; histologically, the normal proportion of the red and white pulp in the spleen was changes; spermatogenesis (but not oogenesis) was markedly retarded corresponding to the age of 12-15 days in normal males; also skin displayed a persisting immaturity as reflected by an abundance of mast cells.
(15) Adult females homozygous for temperature-sensitive alleles exposed to the restrictive temperature during oogenesis produce embryos that show anterior segments with structures normally unique to the eighth abdominal segment, another transformation characteristic of polycomb-group mutants.
(16) This effect may have been related to differences in the environmental factors to whcih the two groups were exposed during oogenesis.
(17) They also suggest that the O-acetylated Neu5Gc and 9-O-Ac-KDN residues may have an important role during oogenesis.
(18) The microtubule array becomes progressively more complex and polarized during oogenesis; an extensive array of microtubules and microtubule bundles was apparent in the animal hemisphere of stage VI oocytes, and a less ordered array was observed in the vegetal hemisphere.
(19) The molecular and cytoplasmic organization of both axes originates during oogenesis and leads to the production of an ooplasmic system which consists of euplasm and deutoplasm (yolk) and contains a nucleus as well as extranuclear determinants of maternal origin.
(20) Serendipity delta (sry delta) is a member of a set of Drosophila zinc finger protein genes showing maximal transcription during oogenesis.