“Rare Genetic Diseases in Children: An Internet Resource Gateway.” A collection of web pages about various genetic diseases, compiled by the New York University Medical Center.

“The Cell Cycle and Mitosis Tutorial.” An introduction to the cell cycle and the process of mitosis, including charts, animation, vocabulary, and a quiz; developed by the Biology Project at the University of Arizona.

“Meiosis Tutorial.” An introduction to the process of meiosis, providing charts, animation, vocabulary, and a quiz; developed by the Biology Project at the University of Arizona.

“Trisomy 21: The Origin of Down Syndrome.” An article by Len Lashin, M.D., FAAP, from his site, “Down Syndrome: Health Issues: News and Information for Parents and Professionals.”

“Recommended Down Syndrome Sites on the Internet.” Links compiled for the site “Down Syndrome: Health Issues.”

“Mosaic Down Syndrome.” A companion article to “Trisomy 21: The Origin of Down Syndrome,” listed above.

“Sex Chromosome Variations.” Articles provided by Klinefelter Syndrome and Associates (some links seem to be under construction).

American Association for Klinefelter Syndrome Association and Support. This site features articles, links, resources, a newsletter, and information on regional support groups.

Basic information about children with Klinefelter syndrome, provided by SpecialChild.com.

“Genetic Features of Turner Syndrome.” Detailed information on Turner syndrome from the National Institute of Child Health and Human Development at the National Institutes of Health.

Turner Syndrome Society of the United States. This site includes medical information and information for families, conference announcements, a newsletter, a bulletin board and chat room for members, a photograph gallery, and a store offering books and videotapes.

“Health Supervision for Children with Turner Syndrome.” A policy statement from the American Academy of Pediatrics.

Turner syndrome images from the textbook Medical Genetics, Second Edition (Mosby, 2000).

“Chromosome Translocations.” Information for families.

“Genetics 101 of Angelman Syndrome.” Definitions and a discussion of inheritance.

“Genetics and the Child with Developmental Delay.” From Jacksonville Medicine (March 2000).

Pictures of children with cri-du-chat syndrome, provided by the Cri-du-Chat Syndrome Support Group.

A diagram of cri-du-chat deletion.

“Diagnosing Williams Syndrome” and “Facts About Williams Syndrome.” Information from the Williams Syndrome Association.

Guidelines for parents, families, and teachers caring for with children or adults with Williams syndrome. From the Williams Syndrome Foundation.

“Health Care Information for Children with Williams Syndrome.” Guidelines from the American Academy of Pediatrics.

“Ring chromosomes: vicious circles at the end and beginning of life.” From the Atlas of Genetics and Cytogenetics in Oncology and Haematology.

“Proteomics Tour.” A tour of the proteomics technology used by Incyte Genomics.

“Mutations.” Detailed information about mutations.

“MendelWeb,” a site dedicated to Gregor Mendel and classical genetics.

“Autosomal Recessive Disorders Fact Sheet,” developed by the Human Genome Education Model Project II.

National Tay-Sachs and Allied Diseases Association, Inc. “What Every Family Should Know: The Allied Diseases Profiled,” “What Every Family Should Know: Modes of Inheritance,” and “What Every Family Should Know: Services to Families.” Descriptions, inheritance information, and a services directory for families dealing with Tay-Sachs and allied diseases.

Information on Duchenne muscular dystrophy, from the Muscular Dystrophy Association.

National Hemophilia Foundation.

National Fragile X Syndrome Foundation. This site presents a wealth of in-depth, practical information.

“Rett Syndrome Resources.” Information on research, parent support, and advocacy, education, and legal issues.

“Neurological Disorders: Rett Syndrome.” Rett syndrome links compiled by the Internet Resource for Special Children.

“The Catalogue of Imprinted Genes and Parent-of-origin Effects in Humans and Animals.” More than 300 entries discussing imprinted genes.

Online versions of literature for families and doctors, written and distributed by the Angelman Syndrome Foundation, Inc.

Facts about Angelman syndrome and photographs of people with Angelman syndrome.

“Multifactorial Inheritance.” Information from the Children’s Medical Center of Dallas.