Klinefelter's Syndrome

Klinefelter's syndrome is the condition first described in 1942 in which males have an extra X sex chromosome, also known as XXY syndrome. It is the most common sex chromosome disorder, affecting 1 in 1000 males. The effects often include small testicles, decreased fertility, increased breast size, less facial hair, and learning disabilities.

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Klinefelter's Syndrome

Why is someone with klinefelters syndrome male not female?

By definition Klinefelter's syndrome is genetically XXY. If there is any Y chromosome present, the baby will develop into a boy.

Even if a baby had XXXXY, it would still turn out as a boy.

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Who discovered Klinefelter syndrome?

Mr. Klinefelter

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How can you tell if you have Klinefelter's Syndrome?

The only way to be 100% sure if you have Klinefelter's syndrome is to get a genetic analysis done, but short of that you can compare yourself to the symptoms of a person with Klinefelter's to determine if you match that description. If you do match that description, then I would urge you contact your doctor to get a proper diagnosis.

Here are the more common symptoms occurring in Klinefelter's syndrome:

Infertility

Difficulty learning language

Deficits in cognitive executive functioning

Gynecomastia (male breast development)

Widened, rounded hips

Narrow shoulders

Tall, lanky build

Small testicles or small penis

Underdeveloped muscle mass

Little or no pubic, facial, or body hair

Decreased impulse control

Decreased ability to multi-task

Lengthened response time to a stimulus

Poor social skills

Increased risk for developing alcohol/drug abuse

Increased risk for developing psychiatric disorders

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What is observed in a karyotype?

A karyotype is basically a chart of the number and structure of chromosomes. They can reveal ploidy differences (missing or additional chromosomes such as trisomy 21) or chromosomal mutations (like inversions, deletions, translocations etc)

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What type of mutation causes Klinefelter's syndrome?

non-disjunction. Men with this syndrome have an extra X chromosome.

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What is the prognosis for a patient with Klinefelter syndrome?

Males with Klinefelter syndrome have an increased risk of several systemic conditions, including epilepsy, osteoporosis, such autoimmune disorders as lupus and arthritis, diabetes, and breast and germ cell tumors.

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Klinefelter's Syndrome

Why is hla called an antigen?

What is HLA and HLA typing?

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How can you get screened for Klinefelter Syndrome?

If you desire to get screened for Klinefelter's syndrome, talk to your doctor. Depending on the relationship they have with the local lab they can either order the test for you, or they can refer you to an endocrinologist, who can order the test for you. The basic ways the diagnosis will be made is a combination of physical exam, hormone analysis, and chromosomal analysis. (the bloodwork/test - it is called karyotype.

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Is there any famous people with klinefelter syndrome?

Caroline Cossey who appeared in the movie For Your Eyes Only

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What causes Klinefelter syndrome?

It could be a problem very early in development (during pregnancy). About 1/3 of all males with Klinefelter syndrome have other chromosome changes involving an extra X chromosome.

This syndrome isn't considered an inherited condition.
Klinefelter's syndrome is not hereditary. And males who have this disease are infertiled. It means that they can't produce offspring because they can make few sperms.

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Can you get an army medical waiver if you have klinefelter syndrome?

Yes, klinefelters is waiverable in the us army but the marines or navy will disqualify you if they find out.

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What does klinefelters syndrome come from what type of mutation?

Nondisjunction, or sending both chromosomes to one cell during meiosis.

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Klinefelter's Syndrome

A person with Klinefelter's syndrome possesses?

A person with Klinefelter's syndrome possesses an extra X chromosome.

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Klinefelter's Syndrome

How do people get Klinefelter's syndrome?

Well you don't "get" it like you get a common cold. You are born with it due to a genetic mutation on your sex chromosomes causing the XXY gene instead of XY, like in a non-Klinefelter, male.

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Does klinefelter syndrome male have Adams apple?

Yes. The Adams apple may not grow during puberty as will do with other males.

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Can males with Klinefelter's syndrome have babies?

No. The main effects of klinefelter syndrome are development of small testicles, small penises, lower testosterone levels and reduced fertility

While that is true, there have been extreme advance in the use of fertility methods and while it isn't going to be 100% effective there is a higher chance than 0%.

Additionally, penis size is irrelevant when talking about fertility. Most Klinefelter's patients have normal sizes. The problem is called hypogonadism; reduced use of the testicles. The above poster is correct that with genetic counseling, there are relatively good chances of finding viable spermatozoa. I believe that early diagnosis is essential to finding and freezing the spermatozoa, which increases chances by a good amount. Source - I have it.

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Klinefelter's Syndrome

What is the gene mutation for klinefelters syndrome?

Men with Klinefelter's Syndrome have an extra X sex chromosome, so instead of being XY, they are XXY.

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Is carbon dioxide produced during respiration?

Oxygen is produced. Carbon Dioxide is used.

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Which one of the following genotypes causes klinefelter syndrome xy xx xxy or xyy?

xxy

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Do any famous people havehad klinefelter's syndrome?

There have been rumors that some have had this but there is no real proof.

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Klinefelter's Syndrome

What causes Klinefelter's Syndrome?

It could be a problem very early in development (during pregnancy). About 1/3 of all males with Klinefelter syndrome have other chromosome changes involving an extra X chromosome.

This syndrome isn't considered an inherited condition.

Klinefelter's syndrome is not hereditary. And males who have this disease are infertiled. It means that they can't produce offspring because they can make few sperms.

Women who have Turner's Synodrome what similarities is it to Klinefelter's Synodrome?

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What characteristics suggest Sturge-Weber syndrome?

Port-wine stains are present at birth, and seizures may occur in early childhood. If an individual has both of these features, SWS should be suspected.

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Klinefelter's Syndrome

What is the usefulness of pedigree analysis?

Pedigree Analysis helps one to come to know about his/her genetic make-up. One gets aware of his/her recessive or dominant traits. Person can be treated accordingly. If one comes to know that he carries a recessive trait of a particular genetic disorder he should marry a person who is also a carries of that disorder otherwise it will play havoc for the future generations.

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How can Klinefelter's syndrome be detected?

  • Abnormal body proportions (long legs, short trunk, shoulder equal to hip size)
  • Enlarged breasts (gynecomastia)
  • Sexual problems
  • Less than normal amount of pubic, armpit, and facial hair
  • Small, firm testicles
  • Small penis
  • Tall height


There you go^^
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Chromosomal disorders such a Down syndrome Klinefelter's syndrome and turner's syndrome are caused by?

Nondisjunction during meiosis.

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