Autosomal Chromosomal Abnormalities Essay -- Genetic Disorders

Where does deoxyribonucleic acid come from? What is DNA? What is a Trisomy? DNA comes from our p arnts, we get half from milliampere and the other half from dad. DNA is two trains of nucleotide bases coiled into a double helix. The four nucleotide bases are Adenine, Thymine, Cytosine, and yard. Adenine bridges with Thymine and Guanine opposes with Cytosine. Each set has 23 single chromosomes- 22 Autosomes and one X or Y sex chromosome. (Massimini, 2000). Your mother can give you scarce an X chromosome, but your father can pass on an X or a Y chromosome. If you receive an X chromosome from your father, the XX pair makes you genetically a female. If you receive a Y chromosome from your father, then your XY pair youre genetically a male (mayoclinic). Trisomies occur when there is an pleonastic chromosome. An sheath of this would be, we have a total of 46 chromosomes (23 from each parent). When one extra is added this is a trisomy because now theres 47 chromosomes. There are tw o different forms of trisomy they are as follows Partial Trisomy- part of a chromosome attaches itself to another chromosome, and Mosaic Trisomy- every cell contains extra (Massimini, 2000, p.48).DNA getting even is when cells make copies before they divide. DNA is held together by atomic number 1 bonds. Hydrogen bonds are broken by an enzyme and DNA polymerase makes a complementary strand of each parent strands. DNA polymerase moves along the strand of DNA, and uses the bases as a template to make a new strand of DNA. It matches A with T and G with C as it moves along the strand. DNA liagase is the glue that seals both gaps holding the new strand together. DNA polymerase proof reads its work and corrects whatsoever mistakes it finds. If a mistake goes uncorrected the error will become a mutation, c... ...get pregnant. If the other partner is a carrier too then the featherbed will express the disorder.References Evans-Martin, F. (2009). Genes and Disease Down Syndrome. New Yor k, New York. Chelsea House, Infobase publication Martini, H., Nath, J., & Bartholomew, E., (2012). Fundamentals of Anatomy and Physiology 9th edition, California, Pearson PublishingMassimini, K. (2000). Genetic Disorders sourcebook 2nd edition, Michigan, OmnigraphicsMayoclinic staff. (Aug 17, 2010). Triple X Syndrome. Retrieved from http//www.mayoclinic.com/health/triple-x-syndromeSantrock, J. (2011). Life-Span Development 13th edition, New York, New York. McGraw-Hill Starr, C., Evers, C., & Starr, L. (2009). Biology instantly and Tomorrow with Physiology. Mason, Ohio. Cengage LearningTrisomy 18 foundation. (2010). Trisomy 18. Retrieved from http//www.Trisomy18.org