Question 1

is down syndrome dominant or recessive?

Accepted Answer

Neither: Down syndrome happens when an extra 21 chromosome is present in all the cells of the body. It happens before conception when the donor egg fails to shed one of its 21 chromosomes in the formation of the egg & the male 21 joins the female pair & creates an embryo with 3 number 21's.

Question 2

i was wondering is down syndrome dominant or recessive?

Accepted Answer

No autosomal: Down syndrome happens when an extra 21 chromosome is present in all the cells of the body. It happens before conception when the donor egg fails to shed one of its 21 chromosomes in the formation of the egg ; the male 21 joins the female pair ; creates an embryo with 3 number 21's.  It has nothing to do with traits or mutations in the gene code.

Question 3

is it true that down syndrome is dominant or recessive?

Accepted Answer

No: Down syndrome (trisomy 21) is neither dominant nor recessive.  Trisomy 21 means there are 3 copies of chromosome 21 (normal is 2 copies or 1 pair). The terms "dominant" and "recessive" are used to describe particular genes and the traits they produce. A chromosome is a much bigger structure, containing more than thousands of genes. Normal humans have 23 pairs of chromosomes (46 total chromosomes).

Question 4

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 5

is down syndrome dominant , recessive , polygenic inheritance , multiple alleles , sex linked, codominance , or incomplete dominance ?

Accepted Answer

Abn. cell division: Most cases of Down syndrome are not inherited. When the condition is caused by trisomy 21, the chromosomal abnormality occurs as a random event during the formation of reproductive cells in a parent. The abnormality usually occurs in egg cells, but it occasionally occurs in sperm cells. An error in cell division called nondisjunction results in a reproductive cell with an abn. number of chromosoms

Question 6

is down syndrome sex linked/recessive/or dominant?

Accepted Answer

None of the above: Down syndrome happens when an extra 21 chromosome is present in all the cells of the body. It happens before conception when the donor egg fails to shed one of its 21 chromosomes in the formation of the egg; the male 21 joins the female pair & creates an embryo with 3 number 21's.  It has nothing to do with traits or mutations in the gene code.

Question 7

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 8

i'm doing a science project on down syndrome and my teacher wants to know dominate recessive or chromosomal (how common) can you help?

Accepted Answer

Aneuploidy is a : genetic accident, not an inheritable disorder. If you really want to learn about it, you can try the professional website OMIM.org. If that's not for you, try www.ndss.org or www.nads.org.

Question 9

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 10

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.

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Doctor answers about:

Down syndrome dominant or recessive

A member asked:

Is down syndrome dominant or recessive?

A member asked:

I was wondering is down syndrome dominant or recessive?

A member asked:

Is it true that down syndrome is dominant or recessive?

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:

Is down syndrome dominant , recessive , polygenic inheritance , multiple alleles , sex linked, codominance , or incomplete dominance ?

A member asked:

Is down syndrome sex linked/recessive/or dominant?

A member asked:

Down syndrome is autosomal dominat?

A member asked:

I'm doing a science project on down syndrome and my teacher wants to know dominate recessive or chromosomal (how common) can you help?

A member asked:

What is down syndrome?

A member asked:

Why is my baby down syndrome?

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