Genetic Disorders Flashcards
Connective Tissue Genetic Disorders Table
Marfan’s Syndrome
Connective Tissue
AD
fibrillin abnormalities
(some type I collagen)
FBN1 or TGF-BR2
Ehlers-Danlos Syndrome
AD (most common)
Defects in type I and III collagen
COL3A1-type 3
COL1A2-type 7
Homocystinuria
AR
Deficiency of the enzyme cystathionine beta-synthase
Muchopolysaccharidosis table:
All are AR, except Hunter (XR
alpha-L-iduronidase (Scheie and Hurler)
Hunter Syndrome
X-linked Recessive
Hurler’s syndrome
AR
deficiency of the enzyme alpha-l-iduronidase
Maroteaux-lamy syndrome
AR
Morquio Syndrome
AR
San Filippo Syndrome
AR
Scheie Syndrome
AR
Deficiency of the enzyme alpha-l-iduronidase
Muscular Dystrophies Table
Duchenne Muscular Dystrophy
XR
defect on the short arm of chromosome x
Dystrophin Gene
Becker Dystrophy
XR
Fascioscapulohumeral dystrophy
AD
Limb-girdle dystrophy
Ar
Steinert Disease
(myotonic dystrophy)
AD
Hematologic Disorders with Genetic components Table
Hemophilia
Xr
Hemophila A: Factor 8 deficiency
Hemophila B: Factor 9 deficiency
Sickle Cell Anemia
Ar
Hemoglobin abnormality
(Hemoglobin S presence)
Gaucher’s Disease
AR
deficient activity of the enzyme B-glucosidase
(glucocerebrosidase)
Hemochormatosis
Ar
Niemann-Pick Disease
Ar
accumulation of sphingomyelin in cellular lysosomes
Thallassemia
Ar
abnormal production of hemoglobin A
Von Willebrands Disease
AD
Chromosomal disorders with MSK abnormalities
Down Syndrome
Trisomy 21
Angelman Syndrome
Chromosome 15 abnormality
Edward Syndrome
trisomy of chromosome 18
Fragile X syndrome
x-linked trait
Xq27-28