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What does 3p stand for?

3p stands for short arm of chromosome 3


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Each chromosome has a constriction point called the centromere, which divides the chromosome into two sections, or “arms. ” The short arm of the chromosome is labeled the “p arm. ” The long arm of the chromosome is labeled the “q arm. ” The location of the centromere on each chromosome gives the chromosome its characteristic shape, and can be used to help describe the location of specific genes.
Wolf-Hirschhorn syndrome is caused by a deletion of genetic material near the end of the short (p) arm of chromosome 4 at a position described as 4p16. 3. The signs and symptoms of this condition are related to the loss of multiple genes from this part of the chromosome. The size of the deletion varies among affected individuals; studies suggest that larger deletions tend to result in more severe intellectual disability and physical abnormalities than smaller deletions.
Other forms of Turner include mosaicism for X chromosome monosomy (eg, 45,X/46,XX) or 45,X/46,XY mosaic with or without a partial deletion of the Y chromosome. The remaining patients have a structural abnormality of the second X chromosome (eg, an isochromosome of the long arm of X or a deletion involving the short arm of one X). Deletions involving the distal portion of the short arm of the Y chromosome.