Question 1

is down syndrome a sex linked chromosomal disease?

Accepted Answer

No: it involves chromosome 21 an extra copy-trisomy
and translocsation of acrocentric chromosomes andvchromosome 21

Question 2

is down syndrome always caused by a defect in the 21 chromosome?

Accepted Answer

Extra chromosome 21.: Either complete or partial trisomy for chromosome 21 is always responsible for down syndrome.

Question 3

other than down syndrome, what are two diseases that occur when an abnormal number of chromosomes develop?

Accepted Answer

Many to choose from: Turner syndrome - the 45 xo deletion of one sex chromosome, the klinefelter syndrome, 47 xxy, the edward syndrome-trisomy 18, and many more.

Question 4

how do i make a punnutt square for down syndrome. yes, it's a chromosome defect, but it can also be inherited. answer asap. thanks!

Accepted Answer

See below: Approximately, 92-94% of cases of Down syndrome is the result of nondisjunction of chromosome during the meiosis process.  Only 4% of cases are inherited from the faulty chrosome, i.e., translocation.

Question 5

can chromosomal microarray detect down syndrome? what's the difference between chromosomal microarray and the conventional karyotypying?

Accepted Answer

It may, depends: First step is conventional karyotyping, if the clinical suspicion present for Down syndrome, detection of an extra chromosome 21, or trisomy, instead of two.  In 95% of Down syndrome it&#x27;s diagnostic, but If it didn&#x27;t detect and suspicion is still there - next step could be a microarray, which designed to detect submicroscopic abnormalities not detected by regular karyotyping for the rest of 5% D-s

Question 6

which type of chromosomal mutation causes down syndrome?

Accepted Answer

Trisomy 21: Down syndrome is also called trisomy 21.  That means that there is a partial or complete third copy of the chromosome 21.  It is the most common chromosomal abnormality.

Question 7

what is the reasons that lead to inversion duplication in chromosome 21 that lead to down syndrome?

Accepted Answer

Explanation : Down syndrome is trisomia of 21 chromosome due to abnormal distribution of chromosomes in process of cell's divisions. Some risk factors as mother"s age after 35 years very important.

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 would be a good way to cure down syndrome? what would be a way to remove the extra chromosome from every cell in the body? i need a good idea. thanks :)

Accepted Answer

There : There is no cure for Down syndrome and no way that anyone knows of to affect the chromosomes of every cell in the body.

Question 10

does measuring small during first us appt (being 1 week off - measured 6w2d, should be 7w2d) indicate issues down the line (i.e. increased risk for down syndrome or other chromosomal abnormalities, etc.)?

Accepted Answer

: Conception date can be determined by Last Menstrual Period (LMP) or by early ultrasound calculation. If the dates do not match, the Ultrasound date is typically more accurate. It does not mean that the baby measured small, just that your original calculation may have been off. Because ovulation varies with each cycle, conception dates are difficult to pinpoint with LMP.

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Doctor answers about:

Down syndrome chromosome affected

A member asked:

Is down syndrome a sex linked chromosomal disease?

A member asked:

Is down syndrome always caused by a defect in the 21 chromosome?

A member asked:

Other than down syndrome, what are two diseases that occur when an abnormal number of chromosomes develop?

A member asked:

How do i make a punnutt square for down syndrome. yes, it's a chromosome defect, but it can also be inherited. answer asap. thanks!

A member asked:

Can chromosomal microarray detect down syndrome? what's the difference between chromosomal microarray and the conventional karyotypying?

A member asked:

Which type of chromosomal mutation causes down syndrome?

A member asked:

What is the reasons that lead to inversion duplication in chromosome 21 that lead to down syndrome?

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 would be a good way to cure down syndrome? what would be a way to remove the extra chromosome from every cell in the body? i need a good idea. thanks :)

A member asked:

Does measuring small during first us appt (being 1 week off - measured 6w2d, should be 7w2d) indicate issues down the line (i.e. increased risk for down syndrome or other chromosomal abnormalities, etc.)?

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