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The presence of three copies of a chromosome is known as a trisomy. An example would be Trisomy 21, also known as Down Syndrome.

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Q: What is it called when an individual has three copies of a chromosome?
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What is the condition in which an individual has three copies of a chromosome?

trisomy!


When cells contain three copies of a chromosome it is called?

Triploid.


What is it called when one person has three copies of one chromosome?

trisonomy


In one kind of abnormal chromosome inheritance called down syndrome a child has three copies of what?

chromosome 21


In one kind of abnormal chromosome inheritance called?

In one kind of abnormal chromosome inheritance called Down syndrome, a child has three copies of Chromosome 21!


Trisomy is a mutation that results in a cell having an extra?

A trisomy is a condition in which a person has three copies of a chromosome instead of the usual two copies. A person can have full trisomy (three copies in every cell) or mosaic trisomy (three copies in some cells but not all).


Which condition results when cells receive three copies of chromosomes 21?

Down syndrome results when cells receive three copies of chromosome 21.


What are four types of chromosomal mutations?

Four types of chromosomal mutations are Down syndrome (which is a mutation in which there are three copies of chromosome 21), Kinefelter Syndrome (which is a mutation in which a male has an extra X-chromosome), Turner Syndrome (which is a mutation in which a female is missing an X-chromosome), and Patau Syndrome (which is a mutation in which there are three copies of chromosome 13).


What are four of chromosomal mutation?

Four types of chromosomal mutations are Down syndrome (which is a mutation in which there are three copies of chromosome 21), Kinefelter Syndrome (which is a mutation in which a male has an extra X-chromosome), Turner Syndrome (which is a mutation in which a female is missing an X-chromosome), and Patau Syndrome (which is a mutation in which there are three copies of chromosome 13).


Autosomal abnormality resulting in three copies of chromosome 21 is known as?

Trisomey-21


What is trisomy 16?

Edwards' syndrome is caused by an extra (third) copy of chromosome 18. The extra chromosome is lethal for most babies born with this condition. It causes major physical abnormalities and severe mental retardation. Very few children afflicted with this syndrome survive beyond the first year.


What is Trisomy?

A trisomy is a condition in which a person has three copies of a chromosome instead of the usual two copies. Trisomy 9 refers to three copies of chromosome 9. A person can have full trisomy 9 (three copies in every cell) or mosaic trisomy 9 (three copies in some cells but not all).