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Trisomy 21: The Story of Down Syndrome
Written by a physician who has a child with Down Syndrome, this article reviews basic genetics and explains the occurrence of Down Syndrome as a result of nondisjunction in cell division. Includes normal and Down karyotypes....
University of Utah
University of Utah: Photograph of Marfan Syndrome Hand
Photograph compares hand of normal individual with hand of Marfan Syndrome patient.
BiologyWise
Biology Wise: Facts About Human Chromosomes
Presents information about human chromosomes, their structure, and genetic disorders that can result from mutations.