Results 31 to 40 of about 70 (69)

Methylation and gene expression differences between reproductive and sterile bumblebee workers

Evolution Letters, 2019
AbstractPhenotypic plasticity is the production of multiple phenotypes from a single genome and is notably observed in social insects. Multiple epigenetic mechanisms have been associated with social insect plasticity, with DNA methylation being explored to the greatest extent.
Hollie Marshall, Zoë N. Lonsdale, Eamonn B. Mallon   +2 more
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Sterility and Reproductive Inhibition of Japanese Quail Induced by Mestranol Ingestion

Poultry Science, 1970
Abstract THE sex of mammals has been altered by treating neonatal animals with several steroid sex hormones. There is one report that sexes of birds were altered during a similar stage of development after hatching (Wentworth, 1968). Mazer and Mazer (1939), Bradbury (1947), and Huffman (1941) observed that injection of prepubertal female rats with ...
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Reproductive biology and induced sterility as determinants for genetic control of mosquitoes with the Sterile Insect Technique

Malaria remains an important health issue in sub-Saharan Africa, and new methods to reduce the disease are needed. In this thesis, the use of the Sterile Insect Technique (SIT) against the African malaria vector Anopheles arabiensis was explored. The SIT relies on the releases of large numbers of sterilised males. If the sterile males are successful in
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Reproduction and Distribution of the Cytoplasmic Factor for Male Sterility in Maize [PDF]

Proceedings of the National Academy of Sciences, 1949
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[Forced sterilizations, reproductive rights and informed consent].

Revista peruana de medicina experimental y salud publica, 2014
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Reproductive Skew and the Origin of Sterile Castes

The American Naturalist, 2003
Reproductive skew theory has not heretofore formally addressed one of the most important questions in evolutionary biology: How can whole-life sterile castes evolve? We construct a transactional skew model investigating under what conditions a subordinate in a multimember group is favored to develop into a morphologically specialized worker caste.
Jae Chun Choe, Joonghwan Jeon
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GENETIC ENGINEERING OF REPRODUCTIVE STERILITY IN PINUS RADIATA

Acta Horticulturae, 1998
Generation of transgenic trees for reproductive incompetence is an important application of genetic engineering to commercial forestry. This involves isolation and characterisation of the regulatory regions of the genes expressed at the very early stages of male and female reproductive organ development.
Tina V. Glassick, Lawrence C. Murphy, Soma S. Marla, Robert D. Teasdale, Aidyn Mouradov, Tim Sawbridge, Y. Yang, B. Hamdorf   +7 more
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Reproductive outcome after sterilization reversal in women of advanced reproductive age.

Journal of assisted reproduction and genetics, 1999
Our objective was to assess the clinical outcome of tubal reversal in women of advanced reproductive age.A multicenter retrospective chart review of 153 patients who underwent a tubal ligation reversal was carried out. Patients were evaluated according to age.
Mark V. Sauer, Meike L. Uhler, Peter L. Chang, Matthew A. Cohen, Richard S. Legro, Steven R. Lindheim, Steven R. Lindheim   +6 more
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Immunology and Reproduction

Gynecologic and Obstetric Investigation, 1980
This review on sterility immunology deals exclusively with immunological mechanisms hindering gamete junction. It does not elaborate the different immunological aspects of infertility after gamete junction. Thus spermatozoal seminal plasma and ovum antigens producing auto- or isoimmunization as immunological mechanisms hindering gamete junction in ...
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Reproduction in mules: Embryo transfer using sterile recipients

Equine Veterinary Journal, 1985
SummaryNine intraspecies horse embryos and four intraspecies donkey embryos were recovered non‐surgically on Days 7 or 8 after ovulation and transferred surgically to recipient mules. Five of the horse embryos and three of the donkey embryos were transferred to cycling mules that had ovulated five to seven days before transfer as determined by serial ...
D. F. Antczak, Christopher J. Davies, W. R. Allen   +2 more
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