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

what is down syndrome?

Accepted Answer

Chromosome defect: Ds is one of the more common chromosome(c) defects that can survive pregnancy (many others miscarry).Eggs are supposed to have a single 21c & combine with the 21 from dads normal sperm.Here a pair of moms 21c +dad's 21 creates a baby with the extra 21c in all tissues.This extra material confuses the creation of body parts causing ds..Various prenatal tests can pick up signs early on.

Question 3

why is my baby down syndrome?

Accepted Answer

Chromosome defect: Ds is one of the more common chromosome(c) defects that can survive pregnancy (many others miscarry).Eggs are supposed to have a single 21c & combine with the 21 from dads normal sperm.In ds the pair of moms 21c +dad's 21 creates a baby with the three 21c in all tissues.This extra material confuses the creation of body parts causing ds..Various prenatal tests can pick up signs early on.

Question 4

why does down syndrome happen?

Accepted Answer

Mistake in chromosom: During the formation of normal eggs or sperm the chromosome(c) pairs are supposed to split leaving one of each in the egg/sperm.At conception the joining of egg/sperm brings together the pair &  as tissue grows it has the proper number in each cell. With ds the egg has a pair of 21c and at conception a triple 21 is created. All cells derived after will have an extra 21 & become a ds child.

Question 5

how can you inherit down syndrome?

Accepted Answer

Yes: A woman with Down syndrome (trisomy 21) may be able to get pregnant, but men with Down syndrome are almost always sterile, due to problems with sperm production.  That means about half of the babies born to women with Down syndrome will inherit an extra chromosome #21 and be Down syndrome babies.  Said another way, if you inherited down syndrome, your mother must have had down syndrome.

Question 6

down syndrome is autosomal dominat?

Accepted Answer

No: No. It is chromosomal. Down syndrome is not usually passed from one generation to the next. So it is not dominant or recessive.

Question 7

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 8

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 9

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 10

how many ways can down syndrome develop?

Accepted Answer

Extra 21 chromosome: The majority of Down syndrome develops when the fertilized egg gets an extra number 21 chromosome from the mother.  When that cell divides and forms an embryo, every one of the cells in the baby's body have that extra 21 chromosome.  There are rare cases where a baby inherits an extra part of the 21 chromosome from one of it's parents.  The extra genes on the 21 chromosome cause the down syndrome.

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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:

What is down syndrome?

A member asked:

Why is my baby down syndrome?

A member asked:

Why does down syndrome happen?

A member asked:

How can you inherit down syndrome?

A member asked:

Down syndrome is autosomal dominat?

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:

How many ways can down syndrome develop?

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