Preliminary communication: hairy tip of nose--a new trait in males.
Hairy nose tip (HNT) is reported here to be another male sex-limited trait in man. Out of 1,220 females examined, none demonstated the trait, whereas the male population frequency is estimated to be 7.35%. The age of onset is 16 years, with a greater prevalence in the age group 46-55, and declining frequency after age 55. Pedigree data do not allow discrimination among several genetic hypotheses.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D008040:Genetic Linkage; D006197:Hair; D006801:Humans; D008297:Male; D008875:Middle Aged; D009666:Nose / Q000002:abnormalities*; D010375:Pedigree; D014998:Y Chromosome