XYY

  • (noun): (genetics) abnormal complement of sex hormones in a male who has two Y chromosomes.

Some articles on xyy:

The XYY Man
... The XYY Man began life as a series of novels by Kenneth Royce, featuring the character of William (or Willie) 'Spider' Scott, a one-time cat-burglar who leaves prison aiming to go straight but finds ... Royce's original books were The XYY Man (1970) Concrete Boot (1971) The Miniatures Frame (1972) Spider Underground (The Masterpiece Affair) (1973) and Trap ... In one episode of the XYY Man, he identifies himself as "Stuart" in a telephone conversation) ...
Genetics Of Aggression - History
... Specifically, four decades ago, the XYY genotype was (erroneously) believed by many to be correlated with aggression ... reported finding a much higher than expected nine XYY men (2.9%) averaging almost 6 ft ... in a survey of 314 patients at the State Hospital for Scotland seven of the nine XYY patients were mentally retarded ...
XYY Syndrome - History - 1970s
... dihydrochloride, which could be used to screen for Y chromosome aneuploidies like 47,XYY ... In June 1970, The XYY Man was published—the first of seven Kenneth Royce spy novels whose fictional tall, intelligent, nonviolent XYY hero was a reformed ... British science fiction TV series Doomwatch featured a 16-year-old XYY boy expelled from school because of his genetic condition, a November 1993 ...
XYY Syndrome
... XYY syndrome is an aneuploidy (abnormal number) of the sex chromosomes in which a human male receives an extra Y-chromosome, giving a total of 47 chromosomes ... This produces a 47,XYY karyotype, which occurs in 1 in 1,000 male births ... its clinical phenotype is normal and the vast majority (an estimated 97% in Britain) of 47,XYY males do not know their karyotype ...
XYY Syndrome - Physical Traits
47,XYY boys have an increased growth velocity from early childhood, with an average final height approximately 7 cm (3") above expected final height ... In Edinburgh, Scotland, eight 47,XYY boys born 1967–1972 and identified in a newborn screening program had an average height of 188.1 cm (6'2") at age 18—t ... all three sex chromosome trisomies 47,XXX, 47,XXY, and 47,XYY ...