Segregation of a supernumerary del(15) marker chromosome in sperm.

Abstract:

:Supernumerary marker chromosomes (SMC) can be associated with both normal and abnormal phenotypes. In addition, SMC are found at higher frequency in males with infertility. We identified a SMC, characterized as a del(15)(q11.2) chromosome, in a phenotypically normal male. Using fluorescence in situ hybridization (FISH), we examined the segregation of the del(15) chromosome in sperm from this patient. Only 6.23% of sperm nuclei showed disomy using a chromosome 15 alpha-satellite FISH probe, instead of the expected 50%. In addition, FISH analysis showed no increase for non-disjunction of chromosome 18, excluding an interchromosomal effect for this chromosome. The significant decrease in sperm bearing the del(15) may be due to tissue-specific mosaicism or a result of some form of selection against the del(15) during spermatogenesis. This finding provides a basis for the observation that SMC(15) are less likely to be inherited from a paternal carrier.

journal_name

Clin Genet

journal_title

Clinical genetics

authors

Cotter PD,Ko E,Larabell SK,Rademaker AW,Martin RH

doi

10.1034/j.1399-0004.2000.580611.x

subject

Has Abstract

pub_date

2000-12-01 00:00:00

pages

488-92

issue

6

eissn

0009-9163

issn

1399-0004

journal_volume

58

pub_type

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