MONGOLISM is usually the result of trisomy of a small acrocentric chromosome in Group 21–22 in the Denver Classification. This is generally referred to as 21-trisomy. These patients have a somatic ...

PATIENTS with the clinical syndrome of mongolism have been shown to have 47 chromosomes instead of the 46 that are present in the normal human karyotype. 1–3 The additional chromosome, a member of the ...

Changes in either chromosome structure or number can occur during cell division. Each human has 46 chromosomes, 22 pairs of autosomes and 1 pair of sex chromosomes (XX: female or XY: male). During ...

DOWNTOWN LOS ANGELES - Researchers at the USC Keck School of Medicine have explained how certain key mutations occur in human lymphomas - a process that has, until now, remained a mystery. The ...