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Klinefelter’s Syndrome. AP Biology 2 3 rd period Michelle Xu & Alice Thai. What is Klinefelter’s Syndrome?. Klinefelter\'s syndrome is a genetic disorder that only affects males.

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klinefelter s syndrome

Klinefelter’s Syndrome

AP Biology 2

3rd period

Michelle Xu &

Alice Thai

what is klinefelter s syndrome
What is Klinefelter’s Syndrome?
  • Klinefelter\'s syndrome is a genetic disorder that only affects males.
  • It occurs when a boy is born with one or more extra X chromosomes, which causes a boy to produce less testosterone than a normal boy. .
  • Due to having an extra X chromosome, the male may possibly have some physical traits unusual for males.
what is klinefelter s syndrome1
What is Klinefelter’s Syndrome?
  • Instead of an XY sex chromosome pattern that most males have, these males have an XXY pattern.
  • Some people with Kleinfelter’s consider themselves to be transgender, intersexed, or transsexual, due to having a more feminine appearance and/or feminine emotions.
other names for klinefelter s
Other Names for Klinefelter’s:
  • 47, XXY
  • XXY Syndrome
  • XXY Trisomy
  • Or 3+X Chromosomes with Y

Frequency of Klinefelter’s:

  • Approximately 1 in 500 to 1,000.
how do you get klinefelter s syndrome
How do you get Klinefelter’s Syndrome?
  • An extra X chromosome most often occurs when the genetic material in the eggs or the sperm splits unevenly.
  • It’s a random event during the formation of reproductive cells
  • An error in cell division called nondisjunction results in a reproductive cell with an abnormal number of chromosomes.
  • It’s diagnosed in adulthood by using a karyotype.
symptoms of klinefelter s syndrome
Symptoms of Klinefelter’s Syndrome

Physical Symptoms:

  • Long legs
  • Wide hips
  • Enlarged breasts
  • Sparse body hair
  • Small testicles
  • Less muscular
  • Weaker bones
symptoms of klinefelter s syndrome1
Symptoms of Klinefelter’s Syndrome

Language Symptoms:

  • Learn to talk late
  • Trouble expressing thoughts and needs
  • Problems reading
  • Trouble processing what they hear

Other Symptoms:

  • Normal sex lives, but cannot father children
  • Produce much less testosterone
treatment of klinefelter s syndrome
Treatment of Klinefelter’s Syndrome
  • Males with Klinefelter’s Syndrome can be given testosterone therapy.
  • If given around the age of puberty, it can help a boy have normal body development.
  • A infertility specialist may be able to help a male with Klinefelter’s syndrome to get a woman pregnant.
history of klinefelter s syndrome
History of Klinefelter’s Syndrome
  • In 1942, Klinefelter’s was discovered by Dr. Harry Klinefelter, along with other doctors at General Hospital in Boston.
  • Doctors reported a group of males with “enlarged breasts, sparse facial and body hair, small testes, and inability to produce sperm.”
  • By the late 1950’s, researches discovered that these men had an extra sex chromosome thus having the pattern XXY.
lifestyle with klinefelter s syndrome
Lifestyle with Klinefelter’s Syndrome

As a Baby, Child, and Teen:

  • May sit up, crawl, and walk later than other infants.
  • Tend to be taller and have less muscle control than other boys.
  • May have language problems
  • Tend to be quiet and undemanding.
  • Entering puberty, these males don’t make as much testosterone.
lifestyle with klinefelter s syndrome1
Lifestyle with Klinefelter’s Syndrome

As an Adult:

  • Look similar to normal males, but are often taller.
  • Likely to have health problems such as breast cancer, vein diseases, tooth decay, and autoimmune disorders.
  • Cannot father children due to infertility.
  • May have a harder time doing work that involves reading and writing.
  • Normal social life with friends and family.
caroline cossey xxxy
Caroline Cossey (XXXY)
  • Cossey was raised as a boy, but changed lifestyle to live as a girl.
  • She became a famous model.
  • She underwent sex-reassignment surgery.
  • Cossey was a James Bond girl in the movie “For Your Eyes Only.”
lili elbe
Lili Elbe
  • Elbe allegedly had Klinefelter’s.
  • She was one of the first identifiable recipients of male to female sex reassignment surgery.
  • Elbe was a fashion model.
  • She was transsexual and underwent experimental surgeries, her first surgery was orchiectomy (removal of testicles).
  • Elbe was written about in David Ebershoff’s best seller, The Danish Girl.
works cited
Works Cited
  • http://men.webmd.com/tc/klinefelter-syndrome-topic-overview
  • http://www.livestrong.com/article/30547-testosterone-treatment-klinefelters-syndrome-work/
  • http://www.nichd.nih.gov/health/topics/klinefelter_syndrome.cfm
  • http://ghr.nlm.nih.gov/condition/klinefelter-syndrome
  • http://www.nlm.nih.gov/medlineplus/ency/article/000382.htm
  • http://ghr.nlm.nih.gov/condition/klinefelter-syndrome
  • http://learn.genetics.utah.edu/content/disorders/whataregd/klinefelter/
  • http://genetics.emedtv.com/klinefelter-syndrome/history-of-klinefelter-syndrome.html
  • http://www.hawaii.edu/PCSS/biblio/articles/2000to2004/2004-ais-and-klinefelters.html
  • http://www.imdb.com/name/nm0876302/bio
  • http://sexual-communication.wikispaces.com/Lili+Elbe
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