aneuploidy
Noun
Meaning
an abnormality involving a chromosome number that is not an exact multiple of the haploid number (one chromosome set is incomplete)
Source: WordNetSynonyms
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Examples
Cancer cells frequently have aneuploidy of chromosomes and chromosome arms, although a cause and effect relationship between aneuploidy and cancer has not been established.
Aneuploidy can lead to congenital abnormalities (such as Down syndrome), pregnancy loss, infertility, or IVF not resulting in pregnancy.
Autosomal aneuploidy can also result in disease conditions.
Partial aneuploidy can also occur as a result of unbalanced translocations during meiosis. citation Deletions of part of a chromosome cause partial monosomies, while duplications can cause partial trisomies.