Results 41 to 50 of about 973,816 (336)

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

Partial dosage compensation in Strepsiptera, a sister group of beetles. [PDF]

, 2015
Sex chromosomes have evolved independently in many different taxa, and so have mechanisms to compensate for expression differences on sex chromosomes in males and females. Different clades have evolved vastly different ways to achieve dosage compensation,
Bachtrog, Doris, Mahajan, Shivani
core   +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

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

The "backdoor pathway" of androgen synthesis in human male sexual development. [PDF]

, 2019
Mammalian sex determination (male versus female) is largely controlled by genes, whereas sex differentiation (development of reproductive structures) is largely controlled by hormones. Work in the 20th century indicated that female external anatomy was a
Auchus, Richard J, Miller, Walter L
core   +2 more sources

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

Preference on prenatal sex determination and its associated factors among currently married women of reproductive age group in Puducherry, India

Nigerian Postgraduate Medical Journal, 2021
Background: Sex determination refers to knowing the sex of foetus during prenatal period for non-medical reasons. Attitude of married women to sex determination is important to improve the sex ratio at birth.
Ganesh Kumar Saya, Kariyarath Cheriyath Premarajan, Gautam Roy, Sonali Sarkar, Sitanshu Sekhar Kar, Yuvaraj Krishnamoorthy, Jeby Jose Olickal, Revathi Ulaganeethi   +7 more
doaj   +1 more source

Dmrt1 polymorphism covaries with sex-determination patterns in Rana temporaria. [PDF]

, 2016
Patterns of sex-chromosome differentiation and gonadal development have been shown to vary among populations of Rana temporaria along a latitudinal transect in Sweden.
Alho, Beukeboom, Brelsford, Brelsford, Brelsford, Brelsford, Cano, Devlin, Dufresnes, Eggert, Evans, Gosner, Goudet, Gramapurohit, Graves, Grossen, Guerrero, Haczkiewicz, Hillis, Hsü, Matsuba, Matsuba, Matsuda, Miura, Nanda, O'Meally, Ogielska, Perrin, Pflüger, R Core Team, Rodrigues, Rodrigues, Rodrigues, Rodrigues, Schartl, Schmid, Schmid, Schmid, Smith, Somers, Stöck, Stöck, Sumida, Swingle, Volff, Voorrips, Witschi, Witschi, Yoshimoto   +48 more
core   +3 more sources

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