Genetic diseases (Klienfelter;s syndrome, Turner's syndrome and Cystic fibrosis)

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Brian Lockyer                                Grade 12 – Research task                           17/02/08

Klinefelter’s Syndrome

Is it a gene or chromosome mutation?

Klinefelter’s syndrome is a chromosomal abnormality in which a male has one or more extra X chromosomes in his cells.  This results in a chromosome compliment of XXY or in even more rare cases XXXY or XXXXY etc.  Sufferers will develop small testes and will experience fertility problems as well as behavioral and physical differences.

What are the symptoms?

Symptoms vary in severity.  The condition often goes unnoticed until puberty, males may develop gnaecomastia and the testes remain small.  Affected males usually are infertile due to azoospermia.  Sufferers are generally tall and thin and their body type usually resembles the body of a female.  Mental retardation is common amongst people with Klienfelter’s syndrome.

What is the prognosis?

Most men with the condition are able to lead normal lives with the exception that they will be sterile and that they will be more susceptible to certain diseases such as arthritis, epilepsy, and osteoparosis.  Recent research has revealed that men with Klinefelter’s have a slightly shortened life span to men without the syndrome.

Have any famous people had the disease?

N/A

How many people get it (incidence rate)?

Klinefelter’s syndrome affects about one in every five hundred male infants born. The chances of having the condition increase with maternal age.  There seems to be no relationship between rates of occurrence to specific ethnic groups and the condition affects males from all ethnic groups equally.

Does it affect males or females or both?

Kleinfelter’s syndrome affects males only.  It is a chromosomal mutation that results in an extra X chromosome being present

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Possible cures?

There is no current cure for Klinefelter’s syndrome.  A Mastectomy may be performed to reduce breast tissue if gnaecomastia causes social and physiological issues for sufferers.  Hormonal treatments may be utilized to encourage the development of secondary sex characteristics.  Parents who have an affected child should receive some form of genetic counseling.

Turners syndrome

Is it a gene or chromosomal mutilation?

Turner’s syndrome is a chromosomal mutation that affects only females.  The chromosome mutilation may occur in three ways.  Most affected females have 45 chromosomes, the missing chromosome being one of ...

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