The Genetic Disorder Or Autoimmune Disease How Was It...

A-T Questions A. Who first discovered the genetic disorder or autoimmune disease? How was it discovered? Answer: In 1866, Doctor John Langdon Down. He first described Down syndrome as a disorder, but he misunderstood how Down syndrome arises. The cause of Down syndrome was rather recently discovered in 1959. Down syndrome is a genetic disorder and most common cause of cognitive impairments. B. Is the disease state recessive or dominant? Explain your answer. Answer: The disease isn’t a disease, it is considered a disorder. This disorder can’t be a disease because it is a disorder with having an extra chromosome. It is a disorder because it is caused by the chromosomal abnormality called Trisomy 21. C. Difference between†¦show more content†¦Trisomy 21 is a disorder that is also considered a chromosomal abnormality because it has an extra chromosome added. This causes the abnormality to have Down syndrome. Like in most cases of Down syndrome are not inherited. When the condition is caused by trisomy 21, the chromosomal abnormality occurs as a random event during the formation of reproduction cells in a parent. The abnormality usually occurs in egg cells, but it occasionally occurs in sperm cells. E. is it an autosome or sex linked? Explain your answer. Answer: out of 46 chromosomes, 44 are autosomal. The remaining 2 chromosomes are sex chromosomes. Chromosomal disorder Down syndrome/ trisomy 21: having an extra chromosome for the 21st pair causes Down syndrome. This here would be sex linked because your sex chromosomes are the ones who determine if you are to have the disorder. Also because your parents are the ones who are passing their chromosomes and those sex chromosomes are what makes you. F. what specifically causes the disorder or disease? Describe what happens to which gene. Answer: The most common form of Down syndrome is known as Trisomy 21, a condition where individuals have 47 chromosomes in each cell instead of 46. This is caused by an error in cell division called nondisjunction, which leaves a sperm or egg cell with an extra copy of chromosome 21 before or at conception. To the genes when the cell division occurs is when the extra chromosome goes to find a cell and attaches