Results 11 to 20 of about 974,993 (357)

Polygenic sex determination [PDF]

Current Biology, 2013
What is sex determination? Sex determination is the mechanism by which sexual organisms direct gonad development towards distinct but reproductively compatible outcomes. Molecular signaling cascades in the developing gonad provide instructions to the tissue to develop as male or female (or in some cases hermaphrodite), and these signals can be ...
Moore, Emily C., Roberts, Reade B.
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Sex determination systems in reptiles are related to ambient temperature but not to the level of climatic fluctuation

BMC Evolutionary Biology, 2020
Background Vertebrates exhibit diverse sex determination systems and reptiles stand out by having highly variable sex determinations that include temperature-dependent and genotypic sex determination (TSD and GSD, respectively).
Paola Cornejo-Páramo, Andrés Lira-Noriega, Ciro Ramírez-Suástegui, Fausto R. Méndez-de-la-Cruz, Tamás Székely, Araxi O. Urrutia, Diego Cortez   +6 more
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Pleistocene divergence in the absence of gene flow among populations of a viviparous reptile with intraspecific variation in sex determination

Ecology and Evolution, 2021
Polymorphisms can lead to genetic isolation if there is differential mating success among conspecifics divergent for a trait. Polymorphism for sex‐determining system may fall into this category, given strong selection for the production of viable males ...
Peta Hill, Erik Wapstra, Tariq Ezaz, Christopher P. Burridge   +3 more
doaj   +1 more source

Female Sex Development and Reproductive Duct Formation Depend on Wnt4a in Zebrafish. [PDF]

, 2019
In laboratory strains of zebrafish, sex determination occurs in the absence of a typical sex chromosome and it is not known what regulates the proportion of animals that develop as males or females.
Bruce W. Draper, John H. Postlethwait, Michelle E. Kossack, Parr, Rachel E. Hopton, Samantha K. High, Takahashi, Uchida, Yi-lin Yan   +8 more
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Gender determination and gender gap: A cross sectional comparative study of mothers attending under five immunisation clinics in urban and rural areas

Journal of Family Medicine and Primary Care, 2021
Background: Sex ratio is an important sociodemographic characteristic of the country reflecting the status of its women and underlying socioeconomic and cultural patterns.
Shalini Rawat, Ashwini Yadav, Kamaxi Bhate   +2 more
doaj   +1 more source

Sex determination in mythology and history [PDF]

, 2005
The history of ideas on how the sexes became divided spans at least three thousand years. The biblical account of the origin of Eve, and the opinions of the philosophers of classical Greece, have unexpected bearings on present-day ideas.
Mittwoch, U
core   +2 more sources

Antenatal Sex Determination [PDF]

Nature, 1956
FOR thousands of years people have had a desire to know the sex of an expected child. Many methods have been tried for antenatal sex determination; but even modern ones, based upon scientific hypotheses, have failed to receive sufficient confirmation for general acceptance.
F, FUCHS, P, RIIS
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Sex hormone-binding globulin regulation of androgen bioactivity in vivo : validation of the free hormone hypothesis [PDF]

, 2016
Sex hormone-binding globulin (SHBG) is the high-affinity binding protein for androgens and estrogens. According to the free hormone hypothesis, SHBG modulates the bioactivity of sex steroids by limiting their diffusion into target tissues.
Antonio, Leen, Blokland, Marco, Carmeliet, Geert, Claessens, Frank, Decallonne, Brigitte, Dubois, Vanessa, Fiers, Tom, Gielen, Evelien, Hammond, Geoffrey L, Huhtaniemi, Ilpo T, Jardí, Ferran, Kaufman, Jean, Khalil, Rougin, Laurent, Michaël R, Sterk, Saskia S, Vanderschueren, Dirk   +15 more
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408 Cases of Genital Ambiguity Followed by Single Multidisciplinary Team during 23 Years: Etiologic Diagnosis and Sex of Rearing

International Journal of Endocrinology, 2016
Objective. To evaluate diagnosis, age of referral, karyotype, and sex of rearing of cases with disorders of sex development (DSD) with ambiguous genitalia. Methods. Retrospective study during 23 years at outpatient clinic of a referral center.
Georgette Beatriz De Paula, Beatriz Amstalden Barros, Stela Carpini, Bruna Jordan Tincani, Tais Nitsch Mazzola, Mara Sanches Guaragna, Cristiane Santos da Cruz Piveta, Laurione Candido de Oliveira, Juliana Gabriel Ribeiro Andrade, Guilherme Guaragna-Filho, Pedro Perez Barbieri, Nathalia Montibeler Ferreira, Marcio Lopes Miranda, Ezequiel Moreira Gonçalves, Andre Moreno Morcillo, Nilma Lucia Viguetti-Campos, Sofia Helena Valente Lemos-Marini, Roberto Benedito de Paiva Silva, Antonia Paula Marques-de-Faria, Maricilda Palandi De Mello, Andrea Trevas Maciel-Guerra, Gil Guerra-Junior   +21 more
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Clinical and Laboratorial Features That May Differentiate 46,XY DSD due to Partial Androgen Insensitivity and 5α-Reductase Type 2 Deficiency

International Journal of Endocrinology, 2012
The aim of this study was to search for clinical and laboratorial data in 46,XY patients with ambiguous genitalia (AG) and normal testosterone (T) synthesis that could help to distinguish partial androgen insensitivity syndrome (PAIS) from 5α-reductase ...
Nélio Neves Veiga-Junior, Pedro Augusto Rodrigues Medaets, Reginaldo José Petroli, Flávia Leme Calais, Maricilda Palandi de Mello, Carla Cristina Telles de Sousa Castro, Guilherme Guaragna-Filho, Letícia Espósito Sewaybricker, Antonia Paula Marques-de-Faria, Andréa Trevas Maciel-Guerra, Gil Guerra-Junior   +10 more
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