In the early 1960s, rumors began circulating that men were secretly posing as wo
ID: 269353 • Letter: I
Question
In the early 1960s, rumors began circulating that men were secretly posing as women in international sporting events. Soon after, gender verification both by physical gynecologic examination and genetic testing became routine. After decades of controversy, the practice was discontinued in 1999 by the International Olympic Committee, which cited (among other reasons) that gender testing is too difficult and not clear cut. Imagine that you dig up the following gender test medical chart from the 1992 Summer Olympic Games in Medical Examination of Athlete This athlete's karyotype reveals a genetic anomaly caused by a Karyotype event that occurred in the gamete cells of the athletes Duplication nondisionction Beletion Which of the following describes the pattern of sex chromosomes in this 9 10 11 12 13 14 15 16 athlete? 17 18 19 20 21 22 X Y Tal Mild mental impairment The sentence identifying the sex of the athlete is too smudged to read. Based on the athlete's karyotype, determine what the athlete's sex would have been listed as and fill itin on the medical chart.Explanation / Answer
The athlete is recommended to compete as male.
XYY syndrome is not a inherited syndrome. It is a random event that occurs due to nondisjunction of Y chromosomes during anaphase II of meiosis II. This results in the generation of sperm cells with an extra copy of Y chromosome. If the genetic makeup of the child is contributed by one of these atypical sperm cells, then all the body cells of the child have an extra Y chromosome. Children with XYY syndrome are males who are tall due to increased growth velocity and these children have learning problems.
The athlete's karyotype reveals a genetic anomaly caused by nondisjunction event that occurred in the gametes.
Pattern of sex chromosomes in this athlete is XYY.
Based on athlete's karyotype, the athlete's sex would have been listed as male.