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Match the terms in column I with their description in column II and choose the correct option.
Column I Column II
A. Dominance (i) Many genes govern a single character
B. Codominance (ii) In a heterozygous organism only one allele expresses itself
C. Pleiotropy (iii) In a heterozygous organism both alleles express themselves fully
D. Polygenic inheritance (iv) A single gene influences many characters
A B C D
1 iv i ii iii
2 iv iii i ii
3 ii i iv iii
4 ii iii iv i

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answer is D.

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Detailed Solution

A–II, B–III, C–IV, D–I
A. Dominance – In a heterozygous organism, only one allele expresses itself.
B. Co-dominance – In heterozygous organism, both the alleles express themselves fully.
C. Pleiotropy – A single gene inheritance influences many characters.
D. Polygenic – Many genes govern a single character.

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