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Dup15q syndrome is the common name for maternally inherited chromosome 15q11.2-q13.1 duplication syndrome. This is a genomic copy number variant that leads to a type of neurodevelopmental disorder , caused by partial duplication of the proximal long arm of Chromosome 15 .
Kleefstra syndrome affects males and females equally and approximately 75% of all documented cases are caused by Eu-HMTase1 disruptions while only 25% are caused by 9q34.3 deletions. [3] There are no statistics on the effect the disease has on life expectancy due to the lack of information available. [3]
Full trisomy 9 is a rare and fatal chromosomal disorder caused by having three copies of chromosome number 9.It can be a viable condition if the trisomic component affects only part of the cells of the body or in cases of partial trisomy of the short arm (trisomy 9p) in which cells have a normal set of two entire chromosomes 9 plus part of a third copy of the short arm ("p") of the chromosome.
Chromosome 15q duplication is an extremely rare genetic disorder in which there is an excess copy of a segment of DNA found on the long ("q") arm of human chromosome 15.As a result, affected cells contain a total of 3 copies of the duplicated bases, instead of the usual 2 copies - one inherited from the mother and one from the father - found in a normal human diploid genome.
Distal 18q-is a genetic condition caused by a deletion of genetic material within one of the two copies of chromosome 18. [1] The deletion involves the distal section of 18q and typically extends to the tip of the long arm of chromosome 18. [2]
Monosomy 9p (also known as Alfi's Syndrome, 9p Minus 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 copy of chromosome 9 (9p22.2-p23). [1] [2] This deletion either happens de novo or as a result of a parent having the chromosome abnormality. [3]
A genetic region on the short (p) arm of chromosome 16 at a place known as p11.2 is duplicated in individuals with a 16p11.2 duplication. It is sufficient for a duplication in one copy of chromosome 16 in each cell to generate the disease since 16p11.2 duplications follow an autosomal dominant inheritance pattern. [3]
Isodicentric 15, also called marker chromosome 15 syndrome, [2] idic(15), partial tetrasomy 15q, or inverted duplication 15 (inv dup 15), is a chromosome abnormality in which a child is born with extra genetic material from chromosome 15. People with idic(15) are typically born with 47 chromosomes in their body cells, instead of the normal 46.