Down Syndrome (Genes and Disease)
F. Fay Evans-martin,"Down Syndrome"
Chelsea House Publications | June 2009 | PDF | ISBN: 0791096440 | 144 pages | 8.6mb
Down syndrome is a developmental disorder caused by the presence of an extra copy of chromosome 21. This extra genetic material causes changes in the production of various proteins, such as enzymes and cell adhesion molecules, which can disrupt metabolic pathways and cause defects in organ development.