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Yes, a female with Down syndrome has three copies of chromosome 21, but only two copies of the X chromosome. Regarding sex chromosomes, she is genetically normal. For this reason X chromosome inactivation would occur, and she would have one Barr body per cell.
Wiki User
∙ 13y ago
Wiki User
∙ 8y agoThere are the same number in Downs as in others.
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Is it true to state that female only are responsible for down syndrome?
no and waverer some kids have down syndrome
Is down syndrome caused by premature birth?
Down syndrome is not caused by premature birth. Down syndrome is present in the embryo from the time of conception. Down syndrome, in contrast, may lead to premature birth.
What gender is affected mostly by down syndrome female or male?
The proportion of men to women with Down syndrome is about equal.
What is the male female ratio of those who have Down syndrome?
1 in 10
What condition is present in a human embryo when it has 3x21 chromosomes?
Down syndrome.
What is the probability of a 28-year-old female bearing a baby with Down syndrome?
If you look at the link below, the probability of a 28 year old female having a baby with Down syndrome is a little less than 1 in 1000.
What is a karyotpe able to identify?
Karyotypes are able to tell if there are any chromosome conditions present. These condition include Down syndrome, Turner syndrome, Klinefelter syndrome, and Triploidy.
Does the inactivated X chromosome cause Down syndrome?
No, Down syndrome is caused by nondisjunction resulting in an extra chromosome in the 21st pair. An inactivated X chromosome (Barr body) is normal for all females. Females inherit two X chromosomes, and one is heavily methylated.
What is an example of a disorder associated with an error in the number of chromosomes present?
Down syndrome (trisomy 21) is a disorder associated with an error in the number of chromosomes present. Other examples of disorders associated with an error in the number of chromosomes are Trisomy 18 (Edwards Syndrome), Trisomy 13 (Patau Syndrome), Triple X syndrome, and Klinefelter Syndrome.
Difference between the chromosomes of a person with Down syndrome and a person without Down syndrome?
An individual with Down Syndrome has the presence of all or part of an extra 21st chromosome.
Who is the oldest female in the US with Down syndrome?
I do not have real-time data to provide the name of the oldest female in the US with Down syndrome. You may be able to find this information through research or by contacting organizations that focus on Down syndrome advocacy and support.
Is there a connection between Down syndrome and a defect in the AV canal?
Yes, there is a connection. Congenital heart disease is present in half of the children born with Down syndrome, and 45% of them have AV canal defects.
