Down syndrome is a common disorder where the child gets an extra copy of the 21st chromosome. It happens in every 691 babies born in the United States. This adds up to about 6,000 babies born with the disorder a year. The major points in this paper are: when the disorder was discovered, the symptoms, the lifespan, the medical treatments, if it is a dominant trait, what chromosome is affected, and how it is passed down to offspring. The discovery of Down syndrome was by an English physician named
Down syndrome is a genetic disorder in which a person is born with an extra copy of chromosome 21. There are three genetic variations that cause Down syndrome: Trisomy 21, Mosaic Trisomy 21 or Translocation Trisomy 21. There are many ways in which theses disorders affect the body. Trisomy 21 occurs when an egg or sperm comes in with an extra copy of chromosome 21, then, once an embryo is formed and starts to develop, the chromosome is replicated in every single cell of the embryo. Trisomy 21 is
Down syndrome is a birth defect caused by a genetic disorder that affects 350,000 people in the United States. It is caused by abnormalities in the genes and is not inherited, meaning that parents do not pass this onto their children. Genetics is the study of heredity or how certain traits are passed from parents to their children. Genes are the basic unit of heredity. Cells are the building blocks of your body and each one of us has more than 100 trillion cells. Our genes are located in chromosomes
Cole Mattes, Josh Hurwitz Mrs. Jobz CP Biology December 13, 2014 Down Syndrome Hello, our names are Cole Mattes and Josh Hurwitz, we will be writing about down syndrome. This disease is named after John Langdon Down, who was the first physician to tell about the disease systematically. This disease sometimes referred to as 47 or trisomy 21, is a very serious life altering disease. Down syndrome is caused by an extra or partial chromosome 21,which is called nondisjunction. Nondisjunction happens
of down syndrome? According to many National Down Syndrome Society within the United States, Down syndrome has occurred one out of eight hundred births. It is the most frequent form of mental retardation and characterized by well-defined events and distinctive features. It’s a lifelong disorder caused by a genetic defeat that’s none curable. It takes people with patients and kind hearts to care for people with Down syndrome disorder. History In the late nineteenth century John Langdon Down, an
Having a Down syndrome is such a difficult situation for an individual to have. They have slow physical and mental capabilities that lead them to discrimination. Physical features of having a Down syndrome. Including flattening of the head; slanting of the eyelids; a gap between the first and the second toes; a depressed nasal bridge; relatively small ears, mouth, hands and feet; short stature; decreased muscle tone and loose ligaments among others. Not every child with Down syndrome has all of
Down’s Syndrome Down syndrome is a group of physical and mental traits caused by a gene defect that happens before the birth of the child. Children with Down syndrome tend to have a few distinctive physical features such as a flat face and a short neck. They also have some degree of intellectual disability although the severity varies from case to case. But in most cases, it is mild to moderate. In every cell in the human body there is a nucleus, where genetic material is stored in genes. Genes
Down Syndrome They used to be called "Mongoloids," an ethnic insult coined by John Langdon Down, an English physician during the nineteenth century. But now they are known as people, individuals with a condition known as Down syndrome. (3). It wasn't until the 1960s that Jerome Lejeune and Patricia Jacobs discovered the cause of Down syndrome (also called trisomy 21). But with technological advancements within the scientific community, more and more information has been gathered about the
abnormal: atypical behavior. Down syndrome is characterized as a chromosomal condition in which an individual possesses extra genetic material, specifically an extra complete or partial duplicate of chromosome 21 in some or all of an individual 's cells. During the developmental stages, a child with Down syndrome will experience developmental delays in the areas of motor development, cognitive development, language development, and social and emotional development. Down syndrome is identified at birth
Down Syndrome is a chromosomal condition related to chromosome 21. It affects 1 in 800 to 1 in 1000 born infants. People who have Down Syndrome have learning difficulties, mental retardation, a different facial appearance, and poor muscle tone (hypotonia) in infancy. Individuals with Down Syndrome also have an increased risk for having heart defects, digestive problems such as “gastroesophageal reflux or celiac disease”, and hearing loss. Some people who have Down Syndrome have “low activity of