[Answer] Which term describes the chromosomal abnormality of having three copies of a single chromosome?

Answer: trisomy
Which term describes the chromosomal abnormality of having three copies of a single chromosome?

Edwards syndrome also known as trisomy 18 is a genetic disorder caused by the presence of a third copy of all or part of chromosome 18. Many parts of the body are affected. Babies are often born small and have heart defects.

Patau syndrome is a syndrome caused by a chromosomal abnormality in which some or all of the cells of the body contain extra genetic material from chromosome 13.The extra genetic material disrupts normal development causing multiple and complex organ defects. This can occur either because each cell contains a full extra copy of chromosome 13 (a disorder known as trisomy 13 or trisomy D or …

Autosome – Wikipedia

Trisomy – Wikipedia

Trisomy – Wikipedia

Chromosome abnormality – Wikipedia

Having three copies of an autosome (known as a trisomy) is far more compatible with life however. A common example is Down syndrome which is caused by possessing three copies of chromosome 21 instead of the usual two. Partial aneuploidy can also occur as a …

Aneuploidy is the presence of an abnormal number of chromosomes in a cell for example a human cell having 45 or 47 chromosomes instead of the usual 46. It does not include a difference of one or more complete …

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