What is Down’s syndrome give its symptoms Class 12?

What is Down’s syndrome symptoms?

What is Down Syndrome?

  • A flattened face, especially the bridge of the nose.
  • Almond-shaped eyes that slant up.
  • A short neck.
  • Small ears.
  • A tongue that tends to stick out of the mouth.
  • Tiny white spots on the iris (colored part) of the eye.
  • Small hands and feet.
  • A single line across the palm of the hand (palmar crease)

What are the symptoms of Downs syndrome Class 12?

Clinical symptoms: Some of the distinguishing features of Down’s syndrome are: flat face, slanting eye, small mouth, protruding tongue, flattened nose, short neck, short arms and legs, single deep crease across the palm, low IQ, stunted growth, muscular hypotonia, under developed gonads.

What is Down’s syndrome Class 12?

The Down syndrome definition describes it as a chromosomal disorder, wherein, an error in cell division leads to an extra copy of chromosomes in the body. This extra chromosome 21 tends to affect the physical and cognitive abilities of affected individuals.

What is the cause of Down syndrome Class 12?

The most common form of Down syndrome is called trisomy 21. This is a condition wherein people have 47 chromosomes in each cell instead of 46. 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.

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Why is it called Down syndrome?

Down syndrome (DS), also known as trisomy 21, is caused by the presence of all or part of a third copy of chromosome 21 (Figure 1a, b). It is named after John Langdon Down, the British physician who described the syndrome for the first time in 1866.