A century after Down syndrome was first described ... were able to identify a supernumerary copy of chromosome 21 in karyotypes prepared from DS patients (Figure 2). Trisomy 21 is now accepted ...

The three wiggly copies of the 21st chromosome that appeared in a karyotype offered visual proof. I am grateful that my ...

Down Syndrome is a genetic condition in which ... Wong explains: “If the blood test (karyotype) is negative and there is a strong clinical suspicion ... then genetics will do additional testing.” ...

Using genetic testing to detect Down Syndrome is also becoming common these days, a karyotype test confirms the presence of an extra 21st chromosome. Individuals with Down Syndrome may have ...

Each chromosome pair viewed in a karyotype appears to have its own distinct "bar code" of bands. What changes do scientists look for in a karyotype when diagnosing diseases and disorders?