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A genetic disorder caused by the presence of all or part of a third copy of chromosome 21.
Wiki User
∙ 8y ago
Wiki User
∙ 8y agoSomeone with Down syndrome has three copies of chromosome 21. The common number of chromosome 21 is two copies.
Wiki User
∙ 8y agoAn extra #21.
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Can a karyotype reveal turner syndrome?
Yes. A karyotype will show the chromosomes and an affected person will have XXY instead of XY for a normal male.
What type of disorders are karyotyping used to diagnose?
Chromosomal disorders can be observed in a human karyotype. It can show whether there are extra chromosomes, or missing chromosomes, or malformed chromosomes, or whether chromosomes have extra pieces, or missing pieces.
Describe a normal karyotype and a abnormal karyotype?
A normal karyotype will show all 23 chromosomes at normal growth, and the end will show an either XY (boy) or XX (girl). Karyotypes of people with autosomal diseases and other diseases associated with chromosomes will show abnormalities on that certain chromosome. For example, Down syndrome is caused by a whole extra chromosome on chromosome 21. This extra chromosome can be seen on the karyotype.
What is a karyotype and what type of mutation does it show?
A karyotype is a picture of the chromosomes in a cell. For example, a human cell has 46 chromosomes. In the karyotype, 23 pairs of chromosomes will be shown (23 x 2 = 46). A karyotype can show different types of mutations, depending on which chromosome it affects. For example, Down Syndrome is a trisomy in chromosome 21, so there will be THREE instead of two chromosome 21s. You can research more mutations shown by chromosomes in a karyotype.
What are karotype?
A karyotype is a picture of all the chromosomes in a cell (x and y) arranged in pairs. Doctors use this to see if a person has the correct number of chromosomes in his or her body. They also use this for other things. The 23rd pair of chromosomes in the karyotype shows if the person is male or female. A girl would have to x chromosomes (xx) while a boy would have a pair of x and y chromosomes (xy). Karyotypes can show genetic disorders or mutations, such as Down syndrome. In down syndrome, the person has an extra chromosome on the 21st pair. There are only supposed to be 23 pairs (56 single chromosomes). By using a karyotype, Genetic Counselors can determine whether a couple can have a chance of having a baby with a genetic disorder.
Would a kartotype would be most likely be used to diagnose Down syndrome?
A person with Down Syndrome will have 3 chromosomes for the 21st autosome. Karyotypes show these chromosomes which help to diagnose Down Syndrome.
Can a karyotype determine eye color?
A karyotype is chart that shows all the chormosomes paired up and in order. A karyotype cannot determine eye color but it can determine what colors that specific person carries and can pass down to the next generation. BUT to determine what the next generation eye color will look like, it is not possible yet, but you can do a punnett square and that will show you the possible choice(s).
Would a karyotype reveal the presence of a sickle-cell disease?
No a karyotype would not reveal the presence of sickle cell because karyotypes are pictures of all of your chromosomes, so it could show the presence of Down syndrome, but not sickle cell disease.
What can't a karyotype show?
Mutations within a chromosome
What does a pedigree show that a karyotype does not?
A karyotype shows the number of chromosomes in a species A pedigree shows traits passed through generations.
Where on the Internet can you legally watch 'The Doctors' TV show on Down syndrome?
you tube
Was there an old tv series that one of the siblings had down syndrome?
Yes, the name of the show is Life Goes On. Chris Burke, an actor with Down syndrome, played Corky Thatcher. The show ran from September 1989 to May 1993.
