Which of the following is a physical manifestation of Down syndrome quizlet?

Which of the following is a physical manifestation of Down syndrome?

Some common physical features of Down syndrome include: A flattened face, especially the bridge of the nose. Almond-shaped eyes that slant up. A short neck.

What is the cause of Down syndrome quizlet psychology?

An error in cell division called nondisjunction causes trisomy 21. This error leaves a sperm or egg cell with an extra copy of chromosome 21 before or at conception. This variant accounts for 95 percent of Down syndrome cases.

What causes Down syndrome quizlet?

The syndrome is caused by an extra copy of Chromosome 21, and in today’s Nature paper, researchers at the University of Massachusetts Medical School describe a way to “silence” that extra chromosome, meaning it’s still there but its genes don’t get “turned on,” they don’t function and cause problems.

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Which abnormality would a patient with Down syndrome present dental quizlet?

TOOTH ANOMALIES are common in Down syndrome. Congenitally missing teeth occur more often in people with Down syndrome than in the general population. Third molars, laterals, and mandibular second bicuspids are the most common missing teeth.

What is one of the major physical characteristics of the child with Down syndrome?

Kids with Down syndrome tend to share physical features such as a flat facial profile, an upward slant to the eyes, small ears, and a tongue that sticks out.

Why does Down syndrome affect physical appearance?

Many characteristics of full trisomy 21 are quite noticeable—a round face and upturned eyes, and a short, stocky build, for example. People with Down syndrome sometimes move awkwardly, usually due to low muscle tone (hypotonia) at birth that can interfere with physical development.

What commonly causes Down syndrome in humans quizlet?

About 95 percent of the time, Down syndrome is caused by trisomy 21 — the person has three copies of chromosome 21, instead of the usual two copies, in all cells. This is caused by abnormal cell division during the development of the sperm cell or the egg cell. Mosaic Down syndrome.

What of an organism is the physical appearance resulting from the expression of the genes present?

phenotype, all the observable characteristics of an organism that result from the interaction of its genotype (total genetic inheritance) with the environment.

What is Down syndrome considered?

Down syndrome or Down’s syndrome, also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. It is usually associated with physical growth delays, mild to moderate intellectual disability, and characteristic facial features.

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What are the 3 types of Down syndrome?

There are three types of Down syndrome:

  • Trisomy 21. This is by far the most common type, where every cell in the body has three copies of chromosome 21 instead of two.
  • Translocation Down syndrome. In this type, each cell has part of an extra chromosome 21, or an entirely extra one. …
  • Mosaic Down syndrome.

What are signs of Down syndrome during pregnancy?

Some common physical signs of Down syndrome include:

  • Flat face with an upward slant to the eyes.
  • Short neck.
  • Abnormally shaped or small ears.
  • Protruding tongue.
  • Small head.
  • Deep crease in the palm of the hand with relatively short fingers.
  • White spots in the iris of the eye.

When do u know Down syndrome?

Diagnostic tests that can identify Down syndrome include: Chorionic villus sampling (CVS). In CVS, cells are taken from the placenta and used to analyze the fetal chromosomes. This test is typically performed in the first trimester, between 10 and 13 weeks of pregnancy.

Which of the following physical characteristics may be present in a patient with Down syndrome?

A few of the common physical traits of Down syndrome are low muscle tone, small stature, an upward slant to the eyes, and a single deep crease across the center of the palm – although each person with Down syndrome is a unique individual and may possess these characteristics to different degrees, or not at all.

Which abnormality would a patient with Down syndrome present?

An individual with Down syndrome inherits all or part of an extra copy of Chromosome 21. Symptoms associated with the syndrome include mental retardation, distinctive facial characteristics, and increased risk for heart defects and digestive problems, which can range from mild to severe.

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Which of the following oral features are frequently associated with Down syndrome?

People with Down syndrome may have large tongues or they may have an average size tongue and a small upper jaw that makes their tongue too large for their mouth. It is also common for people with Down syndrome to have grooves and fissures on their tongues.