The rectangles represent chromosome 15. Hatched chromosomes have a paternal pattern of gene functioning and DNA methylation; open chromosomes have a maternal pattern. Angelman syndrome is caused ...

Down syndrome is caused by a translocation of chromosomes 15 and 21 (Figure 3), in which the long arms of two acrocentric chromosomes are translocated to produce a single long chromosome ...

Klinefelter syndrome is a genetic condition that affects only males. Here's what you should know about the causes, symptoms, ...

International Angelman Day is recognized on February 15. The date reflects the genetic defect Angelman Syndrome causes in the 15th chromosome and nods to Feburary’s designation as Rare Disease Month.