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.
â¢ Triplet expansion repeat mutations can cause fragile X syndrome or Huntington's disease, by modification of gene expression or gain of function, respectively. â¢ Defective genes are often inherited from the parents. In this case, the genetic disorder is known as a hereditary disease.