Chromosome 9 likely contains 800 to 900 genes that provide instructions for making proteins. These proteins perform a variety of different roles in the body.
What does the 9th chromosome control?
Research shows that several genes that control cell growth and division are located on chromosome 9. Many of these genes are tumor suppressors, which means they normally help prevent cells from growing and dividing in an uncontrolled way.
What happens if your missing chromosome 9?
Features may affect many parts of the body and may include developmental delay , low muscle tone ( hypotonia ), distinctive facial features, heart conditions, scoliosis , and/or genital abnormalities.
What dies each chromosome do?
Each one of our cells contains 23 pairs of chromosomes; one of the chromosomes comes from our mother and the other from our father. Like a recipe book, each chromosome contains a certain number of recipes, known as ‘genes’. Over 20’000 genes are recipes for proteins which are essential components of life.
How common is chromosome 9 inversion?
If one break occurs in the short arm and the other in the long arm of the chromosome, then this is called a pericentric inversion . Chromosome 9 inversion is one of the most common structural balanced chromosomal variants, with an estimated incidence of about 3.5 percent.
What is Alfie syndrome?
Monosomy 9p (also known as Alfi’s Syndrome or simply 9P-) is a rare chromosomal disorder in which some DNA is missing or has been deleted on the short arm region, “p”, of one of the 9th Chromosomes (9p22. 2-p23). This deletion either happens de novo or a result of a parent having the chromosome abnormality.
What is Wolf Hirschhorn Syndrome?
Wolf-Hirschhorn syndrome is a condition that affects many parts of the body. The major features of this disorder include a characteristic facial appearance, delayed growth and development, intellectual disability, and seizures.
What is the rarest chromosomal disorder?
Trisomy 17 mosaicism is one of the rarest trisomies in humans. It is often incorrectly called trisomy 17 (also referred to as full trisomy 17), which is when three copies of chromosome 17 are present in all cells of the body. Full trisomy 17 has never been reported in a living individual in the medical literature.
Is there a cure for Alfis syndrome?
The diagnosis was Chromosome Deletion 9P Minus Syndrome, or Alfi’s Syndrome. There’s no known cause and no known treatment.
What is Trisomy 9 called?
Mosaic trisomy 9 is a rare chromosomal disorder in which the entire 9th chromosome appears three times (trisomy) rather than twice in some cells of the body. The term “mosaic” indicates that some cells contain the extra chromosome 9, while others have the typical chromosomal pair.