Euploidy Aneuploidy
It refers to the state of having a chromosomes number that is an exact multiple of chromosomes number. It refers to a condition in which one or few chromosomes are added or deleted from the chromosome number
A large variation in which the amount of genetic material increases by means of chromosomes sets. A comparative  small variation in which  amount of genetic material increases by means of the number of chromosomes
Example , 2n diploid, 3N triploid 2n-1, 2n+1
Frequently occurs in plants and rarely in animals Occurs both in plants and animals
May lead to the formation of new species Leads to the imbalance in the  number of gene product