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  4. Chromosome complement with 2n - 1 is called

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Q. Chromosome complement with $2n - 1$ is called

JIPMERJIPMER 2009

Solution:

When a change in the chromosome number does not involve entire sets of chromosome and restrict to only a few of chromosome, the situation is called aneuploidy. Aneuploidy may be of following types
(a) Monosomic $(2 n-1)$
(b) Trisomic $(2 n+1)$
(c) Nullisomic $(2 n-2)$
(d) Tetrasomic $(2 n+2)$
(e) Double momosomic $(2 n-1-1)$
(f) Double trisomic $(2 n+1+1)$