The Common Genetic Birth Defects

1170 Words Feb 24th, 2016 5 Pages
One of the most common genetic birth defects is Down syndrome which is a congenital disorder caused from a chromosome defect. It causes impairments and physical abnormalities. This is a condition where a child is born with an extra copy of their 21st chromosome. According to the National Down Syndrome Society (NDSS), 1 in 700 babies are born with DS. There is not an exact cause of how DS happens but there is an explanation as to what happens. When there is any case of reproduction, genes from both parents are passed to the children. Within these genes there are chromosomes and the child is supposed to receive 23 pairs of chromosomes or 46 total. Children with DS end up with 3 copies or an extra partial copy of chromosome 21 instead of 2 because one of the chromosomes did not properly separate, which gives us the name trisomy 21. (What is Down Syndrome?) There are three types of DS; trisomy 21, Mosaicism which is when a child is born with an extra chromosome in only some of their cells, and Translocation which is when children only have part of an extra chromosome 21 attached to another chromosome. (Down Syndrome: Causes, Types & Symptoms) However studies have been tested to prove that it is related to the age of the mother. At age 25, a woman has a 1 in 1,250 chance of having a child with Down syndrome. By age 30 the chance increases to 1 in 952 and then to 1 in 106 by age 40. (What is Down Syndrome?) A number of things can be a symptom for Down syndrome including; body…

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