XXXY

(redirected from XXXXY)

XXXY, XXXXY, XXYY

[thrē′ekswī, fôr′ekswī, dob′əleks′-dob′əlwī′]
the designations for abnormal sex chromosome complements in the human male in which there are more than the normal one X and one Y chromosome, resulting in a total of 48, 49, or more chromosomes in each somatic cell. The aberration is a variant of Klinefelter's syndrome. In general, the more X chromosomes there are, the greater the number of congenital defects and the severity of mental retardation in the affected individual. See also Klinefelter's syndrome.
References in periodicals archive ?
48, XXYY, 48, XXXY and 49, XXXXY syndromes: not just variants of Klinefelter syndrome.
People who are XXY, XXXY, XXXXY, and XXXXXY are known and are phenotypically male, although not always healthy or fertile.
org 7,9 KIDNEY STONES See: Cystinuria KINKY HAIR DISEASE See: Menkes Disease KIRGHIZIAN DERMATOOSTEOLYSIS See: Ectodermal Dysplasias KLINEFELTER SYNDROME 49 XXXXY Syndrome Association 10001 NE 74th St.
org 1,2,5,6,7,8 Spanish/French/German/ Italian/Japanese materials KIDNEY STONES See: Cystinuria KINKY HAIR DISEASE See: Menkes Disease KIRGHIZIAN DERMATOOSTEOLYSIS See: Ectodermal Dysplasias KLINEFELTER'S SYNDROME 49 XXXXY Syndrome Association 10001 NE 74th St.
org 1,2,5,6,8; Spanish/French/German/ Italian/Japanese materials KIDNEY STONES See: Cystinuria KINKY HAIR DISEASE See: Menkes Disease KIRGHIZIAN DERMATOOSTEOLYSIS See: Ectodermal Dysplasias KLINEFELTER SYNDROME 49 XXXXY Syndrome Association 10001 NE 74th St.