Weathering and erosion. Weathering is the process where rock is dissolved, worn away or broken down into smaller and smaller pieces. There are mechanical, chemical and organic weathering processes.
What is trinucleotide repeat disorders? A class of genetic diseases that causes expansion of the number of trinucleotide (three base repeats of CG-rich units) within a gene sometimes associated with deleterious consequences.
Huntingtonâs disease is caused by expansions within a gene that codes for a protein called huntingtin. The gene is characterized by multiple repeats of the 3-letter sequence CAG in the DNA code. Most people have 6 to 34 CAG repeats in the gene.