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Table 1 Molecular and cytogenetic characterization

From: Distinct mechanism of formation of the 48, XXYY karyotype

 

Patient

Father

Mother

KARYOTYPE

48,XXYY

XYY (QF-PCR)

XX (QF-PCR)

AMEL (Xp22.31-Xp22.1/Yp11.2)

XY

XY

X

SRY (Yp11.31)

Present

Present

No

X22 (Xq28Yq)

199/225/241 bp(2:1:1)

199/225 bp(2:1)

220/241 bp

DXS6854 (Xq26.1)

110/110 bp

110 bp

106/110 bp

XHPRT (X26.1)

274/285 bp

285 bp

274/281 bp

DXS6803 (Xq21.31)

110/120 bp

110 bp

120/120 bp

DXS8377 (Xq28)

250/262 bp

250 bp

253/262 bp

DXS6809 (Xq21.33)

263/271 bp

263 bp

267/271 bp

G10_STS47 (Yq11.222)

Present

Present

No

  1. Set of DNA fragment containing genes and genetic markers Short Tandem Repeat (STR) analysed, using Quantitative Fluoresce PCR in the patient and his parents. Parental alleles of the polymorphic markers evidenced that the additional X chromosome of the patient came from the father.