24, Deterioration of genetic purity oceurs due to :
(A) Admixture 18) Developmental variations
(ट) Isolation : (D) Both (A) and (B) but not (C)
25. is heterozygous, but a homogenous population.
(५) Pure line _ (B) Hybrid variety
(C) Open pollinated variety (0) Synthetic variety
26. Multiple effects of a single gene is known as :
(A) Polyploidy (ए) Heteroploidy
(© Pleiotropy (D) None of these
27. Centre of diversity is the area where cultivated plant spe....
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