A researcher has identified a gene linked to a neurodegenerative disease. In individuals that suffer symptoms of this disease, a
t a specific location within this gene the sequence CAG is repeated many times more than it is in unaffected individuals. This disease exemplifies the phenomenon of __________.
Expanding triplet repeats causes a disorder called Triple repeat disorder. It’s a genetic and dominantly inherited neurological disorder and is also classified as an unstable mutation.
Most of these disorders involve a CAG·CTG repeat expansion, such as Huntington disease etc.
The troposphere is shallowest or narrowest at the poles, and deepest or thickest at the equator. At the geographic North and South Poles, the troposphere reaches only 4 miles high, while at the equator, it extends nearly 12 miles high.
