Match the terms in Column-I with their description in Column-II and choose the correct option.

Column-I
A. Do

Question

Match the terms in Column-I with their description in Column-II and choose the correct option.

Column-I
A. Dominance
B. Codominance
C. Pleiotropy
D. Polygenic inheritance

Column-II
1. Many genes govern a single character
2. In a heterozygous organism, only one allele expresses itself
3. In a heterozygous organism both alleles express themselves fully
4. A single gene influences many characters

Accepted Answer

1. Dominance: In a heterozygous organism (dissimilar pair of factors), only one allele (the dominant one) expresses itself, while the other (recessive) is suppressed , .
2. Codominance: In a heterozygous organism, both alleles express themselves fully (e.g., ABO blood groups where IA and IB both express) , .
3. Pleiotropy: A single gene exhibits multiple phenotypic expressions (e.g., Phenylketonuria) .
4. Polygenic inheritance: Traits are controlled by three or more genes (many genes govern a single character) .

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