Which is the most common congenital anomaly associated with Down syndrome quizlet?

What is the most common congenital anomaly associated with Down syndrome?

Three of the most common heart conditions seen in children with Down syndrome are atrioventricular septal defect, patent ductus arteriosus, and tetralogy of Fallot. AVSD is the most frequently diagnosed congenital heart condition in children with Down syndrome.

Which common anomaly is associated with Down syndrome quizlet?

Trisomy 21.

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.

What are 4 common congenital anomalies of a child with Down syndrome?

Fourteen (2%) of the cases with DS had an obstructive anomaly of the renal pelvis, including hydronephrosis. The other most common anomalies associated with cases with DS were syndactyly, club foot, polydactyly, limb reduction, cataract, hydrocephaly, cleft palate, hypospadias and diaphragmatic hernia.

IT IS INTERESTING:  How many chromosomes are in an elephant egg cell?

Which anomaly is associated with Down syndrome?

Fourteen (2%) of the cases with DS had an obstructive anomaly of the renal pelvis, including hydronephrosis. The other most common anomalies associated with cases with DS were syndactyly, club foot, polydactyly, limb reduction, cataract, hydrocephaly, cleft palate, hypospadias and diaphragmatic hernia.

Is TOF associated with Down syndrome?

Mutations of genes that perturb posterior development, such as Wnt2, cause an atrioventricular septal defect (AVSD) (1). The co-occurrence of TOF and AVSD is associated with Down syndrome (2).

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 the most common cause of Down syndrome group of answer choices?

TRISOMY 21 (NONDISJUNCTION)

Down syndrome is usually caused by an error in cell division called “nondisjunction.” Nondisjunction results in an embryo with three copies of chromosome 21 instead of the usual two. Prior to or at conception, a pair of 21st chromosomes in either the sperm or the egg fails to separate.

Which of the following are characteristics of Down syndrome quizlet?

Characteristics

  • eyes that slant upward, have oblique fissures, have epicanthic skin folds on the inner corner, and have white spots on the iris.
  • low muscle tone.
  • small stature and a short neck.
  • a flat nasal bridge.
  • single, deep creases across the center of the palms.
  • a protruding tongue.

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.
IT IS INTERESTING:  Does chromosome number change in mitosis and meiosis?

What are some examples of congenital disorders?

Some common congenital disorders are:

  • cleft lip and cleft palate — usually diagnosed during routine scans in pregnancy.
  • congenital heart disease — including a hole in the heart, a valve problem or a problem with the blood vessels. …
  • cerebral palsy — usually diagnosed in the first few years of life.

What are the characteristics of a child with 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.
  • 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.