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Morphologically differentiated sex chromosomes in neotropical freshwater fish
(2001-12-01)
A general survey of the occurrence of morphologically differentiated sex chromosomes in the neotropical freshwater fishes is presented. The total number of 32 occurrences involving simple XX-XY and ZZ-ZW, and multiple ...
Neurogenin 3 mediates sex chromosome effects on the generation of sex differences in hypothalamic neuronal development.
(Frontiers in Cellular Neuroscience., 2014)
The organizational action of testosterone during critical periods of development is the cause of numer o ussex differences in the brain. However, sex differences in neuritogenesis have been detectedin primary neuronal ...
Sex and neo-sex chromosomes in Orthoptera: a review
(Orthopterists' Society, 2010-12)
We review historical and pioneering work as well as recently published papers about orthopteran sex chromosomes and neo-sex mechanisms, highlighting Michael White's significant contributions. Meiotic research in Orthoptera ...
Sex-specific costs of rearing a nestling and its implications in the brood sex ratio of Magellanic penguins
(Springer, 2021-08)
In birds, possible explanations for a bias in brood sex ratio include differential cost of rearing nestlings of different sexes, and different parental fitness returns related to offspring sex. We studied brood sex ratio ...
Morphologically differentiated sex chromosomes in neotropical freshwater fish
(2001-12-01)
A general survey of the occurrence of morphologically differentiated sex chromosomes in the neotropical freshwater fishes is presented. The total number of 32 occurrences involving simple XX-XY and ZZ-ZW, and multiple ...
Sex and Sexual Behavior in Costa Rica and the United States
(2013)
This study examined differences between Costa Ricans and Euro-Americans in perceptions of appropriate sexual behavior and definitions of sex. When compared to Costa Ricans, Euro- Americans were more likely to consider ...
Sex differences in body fluid homeostasis: Sex chromosome complement influences on bradycardic baroreflex response and sodium depletion induced neural activity
(Pergamon-Elsevier Science Ltd, 2015-12)
Clinical and basic findings indicate that angiotensin II (ANG II) differentially modulates hydroelectrolyte and cardiovascular responses in male and female. But are only the activational and organizational hormonal effects ...
Sexual Risk, Behavior, and HIV Testing and Status among Male and Transgender Women Sex Workers and their Clients in Lima, Peru
(Taylor and Francis, 2018)
Objectives: To determine the socio-demographics, sexual practices, and HIV prevalence of male sex workers (MSWs), transwomen sex workers (TSWs), and their male clients in Lima, Peru. Methods –: Following ethnographic mapping ...
Understanding STI Risk and Condom Use Patterns by Partner Type Among Female Sex Workers in Peru
(Bentham Science Publishers, 2014)
While brothel-based sex work is regulated by the Peruvian government, there is little data on STI risk factors reported by female sex workers (FSW). This study compared high risk behaviors among 120 Peruvian FSW from ...
Screening and characterization of sex-specific DNA fragments in the freshwater fish matrinch, Brycon amazonicus (Teleostei: Characiformes: Characidae)
(Springer, 2012-10-01)
The matrinch Brycon amazonicus, a commercially important freshwater fish resource, has no heteromorphic sex chromosomes so far described. In the present study, we performed a screening of sex-associated DNA markers in this ...