Genetic syndromes Flashcards
Huntington’s dz chromosome
CAG repeat - chromosome 4
HD mode of inheritance
auto dom
tuberous sclerosis inheritance
auto dom
NF1 gene
AD; chrom 17
NF2 gene
AD; chrom 22
Williams syndrome
chromosome 7
Wilson’s dz
chromosome 13 - gene ATP7B
metachromatic leukodystrophy
AR, disorder of myelin, chromosome 22, arylsulfatase A
Tay Sachs
AR, chromosome 15, hexosaminidase A deficiency
Krabbe’s disease
AR, chromosome 14, galactocerebrosidase beta-galactosidase
Lesch-Nyhan syndrome
XR, hypoxanthine-guanine phosphoribosyltransferase
Gaucher’s disease
AR, chromosome 1, beta glucosidase deficiency
von Hippel Lindau
AD, chromosome 3, retinal and CNS tumors
most common tumor site in VHL
cerebellum
Ataxia-telangiectasia
AR, ataxia around age 1
Fabry’s dz
X linked lysososomal storage dz, alpha galactosidase A
Freidrich’s ataxia
AR, chromosome 9, GAA repeat
Myotonic dystrophy
AD, chromosome 19, CTG repeat
trisomy 18
congenital heart dz, polycystic kidneys, MR, microcephaly
cri-du-chat syndrome
chromosome 5
Prader Willi
chromosome 15
what is the genetic defect in fragile X?
CGG repeat
benign familial neonatal convulsions
AD, voltage gated calcium channels
PKU
AR, cannot convert phenylalanine to tyrosine (hydroxyls enzyme).