Down syndrome is a genetic condition where a person is born with an extra chromosome 21. It was first described by Dr. John Langdon Down. People with Down syndrome have 46 chromosomes instead of the typical 46, with the extra chromosome causing delays in physical and mental development. While the cause is unknown, it occurs when there is an extra chromosome in the 21st pair. Those with Down syndrome often have characteristic physical traits and may experience medical issues such as heart defects, eye and vision problems, hip issues, and thyroid problems.

1. Down syndrome
Sara & Clara

2. What is Down syndrome?
 It is a condition in wich a person is born with an extra cromosome. That means
that if you have Down syndrome, you have more genetic information than the
other people.Is a chronic,non infectious disease and sporadic.
Why is it called Down syndrome ?
 Down syndrome was first studied and described by a doctor named John Langdon
Down.

3. WHAT IS A CROMOSOME ?
 CROMOSOME: is a package of DNA wich contains
genetic information. It is located in the nucleus of the
cell. We have 46 cromosomes (23 couples) in each
cell, but if you have one more in the 21 couple, it
means that you have Down síndrome. This extra
cromosome develops mentally and physically features.

4. What is the cause of Down syndrome?
 We have 23 couple of cromosomes; in the couple 21 the people who
has “Down” instead of having 2 cromosomes they have 3.
 The scientifics don’t know why this happens and there is no way to
prevent it.

5. How does Down syndrome affect kids?
 Kids with Down syndrome tend to share certain phisycal features:
1. A flat facial profile
2. Small ears
3. Proturding tongue
4. A line in the hand that we doesn’t have
5. Almond shaped eyes.

6. How does Down syndrome affect kids?
 Kids with Down syndrome tend to share certain phisycal features:
 Small hands with small fingers.
 Decreased muscle tone.
 White spots on the colored part of the eye (Brushfield spots)
 Slow learning.

7. Do they have any medical problems?
1. The kids with Down syndrome can have some medical problem such
as:
2. Cardiopathies.
3. Eye problems like cataracts.
4. Hip problems and risk of dislocation
5. Teeth that appear later than normal and in a location that may cause
problems with chewing
6. Underactive thyroid (hypothyroidism)

8. Video about Down syndrome
Another video

9. The End