Question 1

i am doing a presentation for my class on down syndrome and i need to know why it isn't dominant or recessive.

p.s. i need a simplified answer

Accepted Answer

Seek info here: Lots of HT doctors have answered this for others - here's a start. Just dig a bit further, but it's a good reply.

Source: HealthTap, https://edc1.healthtap.com/user_questions/22610

Question 2

grandauhter has epicanthal folds, does not have down syndrome. has 1/2 brother  with d.s.  is this merely  a characteristic inherited from him?

Accepted Answer

Normal Variation: Epicanthal folds are a normal varient.No it was not inherited from the brother.The genetics are apparently in the family gene pool.

Question 3

how does a person get down syndrome?

Accepted Answer

Dividing Chromasomes: We all have 22 pairs of regular chromosomes (chms) plus an xx or xy of the sex chms. The pairs split during egg or sperm formation so each has 22 chms + an x or y.  If the 21 chromosome doesn't split right & brings a pair to the egg(or sperm) the fertilized egg will have an extra 21 so the infant will have 47 total. All subsequent cells have 47, giving rise to a ds kid.

Question 4

is it possible to catch down syndrome?

Accepted Answer

No: You are born with down syndrome, which is a defect in the chromosome material.You cannot catch it.

Question 5

how do down syndrome & mongloid differ?

Accepted Answer

Old world term: Before the chromosome defect was found in '60's, the the facial structure of Down syndrome kids/adults, reminded folks of the features of mongolian race. Original scientific publications used that terminology. It was well into the '70's before the descriptions began to change ; the public began to use the term Down syndrome exclusively.

Question 6

is down syndrome sex-linked or autosomal?

Accepted Answer

Down Syndrome: Down syndrome, also known as Trisomy 21,  is an autosomal genetic disorder.  Down syndrome occurs when a person has a full or partial copy of chromosome 21.

Question 7

is down syndrome autosomal or sex linked?

Accepted Answer

Extra chromosome: Down Syndrome is caused by having an extra copy of Chromosome 21, so instead of 2 copies, you have 3. This is not an autosomal disorder and is not sex linked. This usually occurs due to abnormal cell division when they egg and the sperm meet during fertilization.

Question 8

are there limited symptoms of down syndrome?

Accepted Answer

Yes: There are high functioning down's and then there are children more severely affected.

Question 9

what is the chance of getting down syndrome?

Accepted Answer

If Mom is 36 at term: risk of having a fetus with DS at 16 weeks' gestation is 1:200; risk of having a full-term baby with DS is 1:275. If mom is 37 at term, risk at 16 weeks is 1:150; at term,  1:225, because some pregnancies are lost. Comprehensive  1st trimester screening  &amp; integrated 1st &amp; 2nd trimester screening calculate risk by specific hormone &amp; protein levels in mom's blood + fetal ultrasound + maternal age.

Question 10

what population is affected by down syndrome?

Accepted Answer

Confusing question: Down syndrome is present in any racial, ethnic, social, economic  or other group in any country in the world. It can occur to women giving birth at any age but is more common in older mothers.

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Doctor answers about:

What is the scientific name for down syndrome

A member asked:

I am doing a presentation for my class on down syndrome and i need to know why it isn't dominant or recessive. p.s. i need a simplified answer

A member asked:

Grandauhter has epicanthal folds, does not have down syndrome. has 1/2 brother with d.s. is this merely a characteristic inherited from him?

A member asked:

How does a person get down syndrome?

A member asked:

Is it possible to catch down syndrome?

A member asked:

How do down syndrome & mongloid differ?

A member asked:

Is down syndrome sex-linked or autosomal?

A member asked:

Is down syndrome autosomal or sex linked?

A member asked:

Are there limited symptoms of down syndrome?

A member asked:

What is the chance of getting down syndrome?

A member asked:

What population is affected by down syndrome?

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