Aneuploidy: A condition in which one or a few chromosomes are added or deleted from the normal chromosome number., A comparatively small variation in which the amount of genetic material varies by means of the number of chromosomes., Nullisomy, monosomy, trisomy and tetrasomy are the variations., Occurs in both animals and plants, Cause meiotic non-disjunction, mitotic non-disjunction and chromosome loss., Leads to the imbalance in the number of gene products., Euploidy / Polyploidy: The state of having a chromosome number that is an exact multiple of the chromosome number., A large variation in which the amount of genetic materials increases by means of chromosome sets., Diploid (2n), triploid (3n) and tetraploid (4n) are the variations., Frequently occurs in plants and rarely in animals, Cause complete non-disjunction and interspecies crosses, May lead to the formation of new species,

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