ID#: 12511
Caption:
This photographic collage depicts the karyotype that would represent the chromosomal configuration seen in a person with Down syndrome (DS). In this particular case, the cells in a person with DS, contain an extra chromosome 21, and is therefore, known as Trisomy 21 (arrow). A karyotype represents a complete set of chromosomes in each and every eukaryote cell of an individual organism. The chromosomes are arranged in pairs, and aligned using the position of each chromosome’s centromere. Pairs are then arranged into groups A through G, based on size. Group G contains the extra 21st chromosome.
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Content Provider(s): CDC/ Dr. Clark Heath
Creation Date: 1967
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Copyright Restrictions: Permission is not required for public domain images, however, these images are provided by CDC and are available for personal, professional, and educational use with appropriate attribution. Redistribution must credit CDC and, where known, the individual photographer, and identify the CDC website as the free source. For additional terms see Use of Agency Materials | Other | CDC