BIOPHOTO ASSOCIATES / SCIENCE PHOTO LIBRARY BIOPHOTO ASSOCIATES / SCIENCE PHOTO LIBRARY
Colour enhanced micrograph of a karyotype showing Klinefelter's syndrome, a common chromosomal abnormality in which one or more extra X-chromosomes are present in a male. It results in small testicles and the inability to make sperm. Additionally, affected males may have learning disabilities and/or behaviour problems.
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