what is down syndrome.???
Answers
ANSWER
Down syndrome is a condition in which a person has an extra chromosome. Chromosome are small "packages" of Genes in the body. They determine how a baby's body forms during pregnancy and how the baby's body functions as it grows in the womb& after birth.
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✍️Down's syndrome is a genetic disorder caused when abnormal cell division results in extra genetic material from chromosome 21.
✍️Physical Symptoms
Common physical signs of Down syndrome include1,2: Decreased or poor muscle tone. Short neck, with excess skin at the back of the neck.
✍️There are three types of Down syndrome: trisomy 21 (nondisjunction), translocation and mosaicism. Trisomy 21, the most common type of Down syndrome, occurs when there are three, rather than two, number 21 chromosomes present in every cell of the body.