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

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 4

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 5

is down's syndrome a recessive condition?

Accepted Answer

No: Down syndrome is not a recessive condition. It is caused by an extra chromosome #21. We normally have a pair (=two copies) of each chromosomes #1-22. Individuals with Down syndrome have a third chromosome #21. Thus name "trisomy 21" as well. Here more about mechanism and heritability of Down syndrome if you are interested: http://ghr.Nlm.Nih.Gov/condition/down-syndrome.

Question 6

is turner's syndrome dominant or recessive?

Accepted Answer

Neither: Turner syndrome is not usually consider dominant or recessive.  In Turner syndrome the affected individual is missing on sex chromosome.  They only have one which is one X chromosome.  The missing chromosome is usually lost during cell division when the cells are multiplying, it can be an X or a Y missing.  So, Turner syndrome is not usually inherited but an event that happened in the new baby.

Question 7

is angelman syndrome dominant or recessive?

Accepted Answer

Neither: Angelman's syndrome doesn't follow simple mendelian genetics.  Rather, it's due to de novo single genetic mutations, translocational errors, chromosomal abnormalities, or more commonly epi-genetic mutations such as changes in dna methylation.

Question 8

is edwards syndrome dominant or recessive , can it be inherited?

Accepted Answer

Neither : Edward syndrome is an abnormality of chromosome numbers, not a trait or mutation in the gene code. It cannot be inherited as all cases are fatal before reproductive age. During conception only one of chromosome of each pair is given by both parents to the fertile egg.If a parent adds their  2 nbr 18th chm to the other parents nbr 18, 3 end up in the egg & the excess 18 causes the  all the problems.

Question 9

is fragile x syndrome dominant or recessive?

Accepted Answer

X linked: This syndrome emerges when a male has a fragile x from his asymptomatic mother and a y from his father. If he were she, a normal x from dad or mom would cancel the fragile x effect.

Question 10

is edward's syndrome autosomal or sex-linked? dominant or recessive?

Accepted Answer

None of the above: Edward syndrome is brought on by an abnormality of chromosome numbers, specifically an extra 18. The abnormal egg with a single chromosome 1-17 & 19-22 + x  has a pair of 18's. When the sperm brings a single chromosome 1-22 + x or y then the embryo ends up with 47 chromosomes rather than 46 in every cell.(3-18's) the excess distorts the organ building information  & defects arise.

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Doctor answers about:

Is down s 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:

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 it true that down syndrome is dominant or recessive?

A member asked:

Is down's syndrome a recessive condition?

A member asked:

Is turner's syndrome dominant or recessive?

A member asked:

Is angelman syndrome dominant or recessive?

A member asked:

Is edwards syndrome dominant or recessive , can it be inherited?

A member asked:

Is fragile x syndrome dominant or recessive?

A member asked:

Is edward's syndrome autosomal or sex-linked? dominant or recessive?

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