Genetic Disorders and Phenotypes

Front

What is Myotonic dystrophy type 1 caused by?

Back

CTG expansion in the 3'UTR.

Front

What defines juvenile huntingtin?

Back

Onset less than 20 years and caused by greater than 60 CAG repeats.

Front

What is the role of TGF-beta in genetic disorders?

Back

Defects in FBN1/Fibrillin lead to an increase in TGF-beta, resulting in individuals with longer limbs.

Front

What causes Hemochromatosis?

Back

A loss of function mutation in the HFE gene.

Front

What genetic deletion is associated with Miller Dieker Syndrome?

Back

17p13.3 deletion.

Front

What is the significance of CAG repeats in genetic disorders?

Back

CAG repeats are associated with various genetic disorders, with different thresholds defining conditions like Huntington's disease.

Front

What is the function of the FBN1 gene?

Back

The FBN1 gene encodes fibrillin, which is important for the structural integrity of connective tissue.

Front

What is the relationship between genetic mutations and phenotypes?

Back

Genetic mutations can lead to specific phenotypes, which are observable traits or characteristics.

Front

What is the role of the HFE gene in iron metabolism?

Back

The HFE gene helps regulate iron absorption in the body, and mutations can lead to iron overload disorders.

Front

What is the clinical significance of TGF-beta in connective tissue disorders?

Back

Increased TGF-beta can lead to abnormal growth and development of connective tissues, contributing to disorders like Marfan syndrome.