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  4. 2n - 2 is known as :

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Q. $2n - 2$ is known as :

Delhi UMET/DPMTDelhi UMET/DPMT 2006

Solution:

Nullisomy is an aneuploid condition in which a pair of homologous chromosomes is deficient and represented as $ 2n-2 $ Monosomy is an aneuploid condition in which a chromosome is deficient from its homologue and represented as $ 2n-1 $ . Trisomy is an aneuploid which has one extra chromosome and represented as $ 2n+1 $ . Polyploidy is the phenomenon of having more than two genomes or set of chromosomes i.e., $ 3n- $ triploidy $ 4n- $ tetraploidy $ 5n- $ pentaploidy.