Q.2. Conditions of a karyotype 2n1 and 2n2 are called
a. aneuploidy
b. polyploidy
c. allopolyploidy
d. monosomy
(a) Aneuploidy involves changes in chromosome number by additions or deletions of less than a whole set. In this case organism gains or loses one or more chromosome. The polyploidy can be triploidy (3n), tetraploidy (4n), p[entaploidy (5n), etc.
Allopolyploidy is the polyploidy in which chromosome sets are non-homologous. In other words, we can say that the allopolyploids are derived from a stock which is heterozygous. Monosomy is the process in which one chromosome is removed from a diploid set of chromosome (2n-1).
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