Rights Act of 18663 and then in section 1 of the Fourteenth. Amendment.4 In doing so, Congress set aside the Dred Scott hold-. ing, and restored the traditional precepts of citizenship by birth.5. Based on the first sentence of section 1,6 the Court has held.
Grouped into 23 pairs, we get one set from our mother and the other from our father. One of these pairs of chromosomes determines if a person is male or female: Males (XY) get the X chromosome from the mother and the Y chromosome from the father. Females (XX) inherit one X chromosome from each parent. The Fragile X premutation can be passed silently down through generations in a family before a child is affected by the syndrome.
As a result, the FMR1 gene is turned off (silenced) and makes very little or no protein. A loss or shortage of FMRP disrupts normal functions of nerve cells and, consequently, the nervous system, causing severe learning problems, intellectual disability, and the other features of fragile X syndrome.ragile X syndrome-caused by mutations in the FMR1 gene. Almost all cases of fragile X syndrome are caused by an expansion of the CGG trinucleotide repeat in the FMR1 gene. In these cases, CGG is abnormally repeated from 200 to more than 1,000 times, which makes this region of the gene unstable.