Conditions of a karyotype 2n +1, 2n –1 and 2n + 2, 2n – 2 are called:
a. Aneuploidy
b. Polyploidy
c. Allopolyploidy
d. Monosomy
The answer is the option (a) Aneuploidy
Explanation: Aneuploidy is the condition in which loss or gain of chromosome is observed due to the failure of separation of chromatids during the cycle of cell division. Hence, (a) is the correct option