BSIP VEM / SCIENCE PHOTO LIBRARY BSIP VEM / SCIENCE PHOTO LIBRARY
Turner's syndrome. Artwork based on a light micrograph of the chromosomes (the karyotype) of someone suffering from Turner's syndrome. A karyotype is an arrangement of chromosomes in a set pattern. This condition, which only affects women, is an absence of the second sex chromosome. In a healthy woman, there would be two X chromosomes instead of one (blue, centre right). The symptoms include stunted growth and retardation of sexual development (leading to lack of menstruation and infertility). Often heart problems are present too, but these can be cleared up with surgery. Turner's syndrome is rare, affecting around one in every 3000 female births.
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