GENEALOGY-DNA-L ArchivesArchiver > GENEALOGY-DNA > 2007-03 > 1174528684
From: Don Jackson <>
Subject: Re: [DNA] Medical and insurance implications of Ychromosome andmtDNA testing
Date: Wed, 21 Mar 2007 20:58:04 -0500
R. & G. Stevens wrote:
>> -----Original Message-----
>> This conversation reminds me of when I read that hairy ears were connected
>> to the y-chromosome. If that's true, what haplogroup has the hair ear
>> Gotta be R's
> It was Grandfather M207's adaptation to the Central Asian cold. The fur also
> lessened the pain when he popped the top off a cold beer with his ear.
HAIRY EARS, Y-LINKED
Alternative titles; symbols
HYPERTRICHOSIS PINNAE AURIS, Y-LINKED
Gene map locus Yq
The trait consists of long hairs growing from the helix of the pinna;
see Dronamraju (1964) and Stern et al. (1964). Controversy has prevailed
as to whether it is Y-linked or autosomal (see 139500), or perhaps both
(in different families). Rao (1970, 1972) proposed that hairy ears
result from the interaction of 2 loci, 1 on the homologous segment of
the X and Y and 1 on the nonhomologous segment of the Y. 30 PubMed Neighbors
Using Y-chromosomal DNA binary-marker haplotyping, Lee et al. (2004)
demonstrated that a cohort of southern Indian hairy-eared males carried
Y chromosomes from many haplogroups of the Y-phylogeny, which, under a
hypothesis of Y linkage, would require multiple independent mutations
within a single population. There was no significant difference between
the Y-haplogroup frequencies of hairy-eared males and those of a
geographically matched control sample of unaffected males. Lee et al.
(2004) concluded that the trait is not Y-linked in southern India and
that, by extension, it is unlikely to be so in any population. 30 PubMed
1. Dronamraju, K. R. :
Y-linkage in man. Nature 201: 424-425, 1964.
PubMed ID : 14110028
2. Lee, A. C.; Kamalam, A.; Adams, S. M.; Jobling, M. A. :
Molecular evidence for absence of Y-linkage of the hairy ears trait.
Europ. J. Hum. Genet. 12: 1077-1079, 2004.
PubMed ID : 15367914
3. Rao, D. C. :
A contribution to the genetics of hypertrichosis of the ear rims.
Hum. Hered. 20: 486-492, 1970.
PubMed ID : 5512123
4. Rao, D. C. :
Two-gene hypothesis for hairy pinnae of the ear. Acta Genet. Med.
Gemellol. 19: 448-453, 1970.
PubMed ID : 5495680
5. Rao, D. C. :
Hypertrichosis of the ear rims: two remarks on the two-gene
hypothesis. Acta Genet. Med. Gemellol. 21: 216-220, 1972.
PubMed ID : 4669458
6. Stern, C.; Centerwall, W. R.; Sarkar, S. S. :
New data on the problem of Y-linkage of hairy pinnae. Am. J. Hum.
Genet. 16: 455-471, 1964.
PubMed ID : 14250426
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