Results 31 to 40 of about 314,234 (309)

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.
openaire   +2 more sources

Can Individuals with 47,XYY Karyotypes Exist without Male Phenotype? A Narrative Literature Review and Case Report

Frontiers in Bioscience-Scholar
Background: The 47,XYY syndrome is a genetic condition found in about 1 in 1000 male children. The expected phenotype is male but could vary greatly.
Marcelo Jones Pires, Laura Coimbra Teixeira, Luise Longo Angeloni, Julia Londero Heleno, Mariana Romano, Marcio Lopes Miranda, Tarsis Paiva Vieira, Mara Sanches Guaragna, Beatriz Amstaldem Barros, Andréa Trevas Maciel-Guerra, Gil Guerra-Junior   +10 more
doaj   +1 more source

Human sex ratio at amniocentesis and at birth in Taiwan

Taiwanese Journal of Obstetrics & Gynecology, 2012
Objectives: An increase in the proportion of male-to-female live births has raised concerns in Taiwan. Disclosure of fetal sex during prenatal screening is not allowed by the Taiwan government.
I-Wen Lee, Yi-Chun Lai, Pao-Lin Kuo, Chia-Ming Chang   +3 more
doaj   +1 more source

Progress in studies of sex determination mechanisms and sex control techniques in Cynoglossus semilaevis (half-smooth tongue sole) [PDF]

Frontiers of Agricultural Science and Engineering, 2016
The Cynoglossus semilaevis (half-smooth tongue sole) is a marine flatfish of great commercial value for fisheries and aquaculture in China. It has a female heterogametic sex determination system (ZW/ZZ) and environmental factors can induce sex-reversal ...
Qian ZHOU,Songlin CHEN
doaj   +1 more source

Distinct sperm nucleus behaviors between genotypic and temperature-dependent sex determination males are associated with replication and expression-related pathways in a gynogenetic fish

BMC Genomics, 2018
Background Coexistence and transition of diverse sex determination strategies have been revealed in some ectothermic species, but the variation between males caused by different sex determination strategies and the underlying mechanism remain unclear ...
Yao-Jun Zhu, Xi-Yin Li, Jun Zhang, Zhi Li, Miao Ding, Xiao-Juan Zhang, Li Zhou, Jian-Fang Gui   +7 more
doaj   +1 more source

The Diversity and Dynamics of Sex Determination in Dioecious Plants

Frontiers in Plant Science, 2021
The diversity of inflorescences among flowering plants is captivating. Such charm is not only due to the variety of sizes, shapes, colors, and flowers displayed, but also to the range of reproductive systems. For instance, hermaphrodites occur abundantly
Ana Paula Leite Montalvão, Birgit Kersten, Matthias Fladung, Niels Andreas Müller   +3 more
doaj   +1 more source

Sex determination in mythology and history

, 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,Ursula, Mittwoch, U
core   +1 more source

Sex determination and maintenance: the role of DMRT1 and FOXL2

Asian Journal of Andrology, 2017
In many species, including mammals, sex determination is genetically based. The sex chromosomes that individuals carry determine sex identity. Although the genetic base of phenotypic sex is determined at the moment of fertilization, the development of ...
Shengsong Huang, Leping Ye, Haolin Chen
doaj   +1 more source

Molt patterns and age and sex determination criteria for selected landbirds in an urban area of the Peruvian Central Coast

Caldasia, 2021
Despite molting is an important and expensive activity in the life cycle of birds, this process is poorly known for neotropical species and even less so for species inhabiting urban zones.
Alexis Díaz, Pamela Ayala, Elizabeth Valdiviezo, Jorge Mendoza, Kathia Silva, Rolf Rivas, Dayanne Cornelio, Fabiola Guardia, Yaquelin Tenorio, Rocío Calsina, Lorena Alvariño, José Iannacone   +11 more
doaj   +1 more source

Carcinomas and Carcinoid Tumors of the Lungs and Bronchi in Children and Adolescents: The EXPeRT Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Primary lung carcinomas and bronchial carcinoid tumors (BC) are very rare malignancies in childhood. While typical BC and mucoepidermoid carcinomas are mostly low‐grade, localized tumors with a more favorable prognosis than in adults, necessitating avoidance of overtreatment, adenocarcinomas of the lung are often diagnosed at advanced disease ...
Michael Abele, Calogero Virgone, Michaela Kuhlen, Sabine Irtan, Yves Reguerre, Malgorzata Krawczyk, Ewa Bien, Tal Ben‐Ami, Maja Cesen, Ricardo Lopez‐Almaraz, Andrea Ferrari, Gianni Bisogno, Dominik T. Schneider, Abbas Agaimy, Constantin Lapa, Hubert Ducou le Pointe, Rainer Claus, Catherine Daniel, Ines B. Brecht, Daniel Orbach   +19 more
wiley   +1 more source