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.
While premutation carriers do not have Fragile X syndrome, they can pass on a full mutation to their children. The likelihood of a carrier mother passing the full mutation to her children increases with the size of her premutation repeat allele, especially if she has at least 100 CGG repeats in the FMR1 gene[6].