A Rare Breed introduces us to Rob Wilson (47XXY), a Tasmanian Chicken and Pig breeder. Rob was born with dual male and female gonads and underwent surgery as a child to present more male-like in appearance. With the assistance of fertility treatments, he went on to ‘father’ children and, by all accounts thereafter has lived …
In 1968, a weapon grave with brooches was found at Suontaka Vesitorninmäki, Hattula, Finland. Since then, the grave has been interpreted as evidence of powerful women, even female warriors and leaders in early medieval Finland. Others have denied the possibility of a woman buried with a sword and tried to explain it as a double …
Continue reading Weapon Grave at Suontaka Vesitorninmäki, Finland
The hypothalamus–pituitary–gonadal axis (HPG) during mini-puberty in boys with KS has been evaluated by several investigative groups and “all” possible results recorded: above normal, below normal or indistinguishable from normal (Aksglaede, Petersen, Main, Skakkebæk, & Juul, 2007; Lahlou, Fennoy, Ross, Bouvatier, & Roger, 2011; Ross et al., 2005). None of these studies has enough boys …
Continue reading Exogenous Testosterone is not a requirement of 47XXY’s at Mini and Pre‑Puberty
The easiest way to distinguish male from female was to count the smallest chromosomes. If there were four, then they assumed that the sample came from a female; if five, then a male. After verifying this assumption with the recorded sex of the samples, they examined cells in a bone marrow sample taken from a Klinefelter’s syndrome patient.
Klinefelter syndrome (KS) is one of the most frequent chromosomal disorders affecting 1/500–600 male newborns in the general population. The vast majority of the cases show the 47, XXY karyotype, although mosaicism (46, XY/47, XXY) or higher-grade X aneuploidies can rarely be detected. Despite its high incidence, KS frequently remains undiagnosed, and it is suspected …
Continue reading Fertility Rates Among Non-Mosaic XXY; At Odds With Real Life Experience
Sex chromosome variations (SCV) are characterised by an atypical variation in the number or function of sex chromosomes. They are some of the most common genetic differences in human beings, and include 47 XXY; one in six hundred live births, 45X ; one in two thousand and 47 XYY; one in one thousand. However, by …
Continue reading Cognitive and Neurological Aspects of Sex Chromosome Variations
https://www.youtube.com/watch?v=gcz1FOWw0Cg Confused with how chromosome numbers change in mitosis and meiosis? The Amoeba Sisters walk you through the mystery of chromosome and chromatid counting in mitosis and meiosis.
https://www.youtube.com/watch?v=zJbTdqiHdTQ The GEMINI project, or Genetics E learning for Medicine In Ireland aims to increase awareness of genetic conditions, genetic testing and diagnosis amongst healthcare professionals via educational presentations, videos and media and to assist in integrating tertiary genetics practice with mainstream medicine.
It took almost 15 years for scientists to sequence and publish a complete accounting of the human genetic code — the 3 billion base pairs along the double strands of DNA that serve as a blueprint for the body’s functions and pass traits from parents to offspring. Now, approximately 15 years after the human genome …
Continue reading The Genetic Origins of Sex Differences in Disease
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