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NEET2015ZoologyPrinciples of Inheritance and VariationActual

Match the following Column I with Column II. array ll|ll & Column I & & Column II A. & Complementary ratio & 1. & 9: 7 B. & Supplementary ratio & 2. & 9: 3: 4 C. & Epistatic ratio (Masking) & 3. & 12: 3: 1 D. & Inhibitory ratio & 4. & 13: 3 array Codes

Options

  1. Aarray cccc A & B & C & D 4 & 1 & 3 & 2 array
  2. Barray cccc A & B & C & D 1 & 2 & 3 & 4 array
  3. Carray cccc A & B & C & D 4 & 1 & 2 & 3 array
  4. Darray cccc A & B & C & D 1 & 3 & 2 & 4 array

Correct answer

B. array cccc A & B & C & D 1 & 2 & 3 & 4 array

Step-by-step solution

Epistasis is interaction between two or more genes to control a single phenotype. Dominant epistasis also called masking has a ratio 12: 3: 1 in the F ₂ phenotype. Supplementary genes which is recessive epistasis has ratio 9: 3: 4 . Complementary gene where both dominant alleles are needed for phenotype has ratio 9:7. Inhibitor gene where one gene inhibits the expression of another gene has ratio 13: 3 in F ₂ progeny.

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