Multiple choice

Match List I (Phenotypic segregation ratio) with List II (Type of gene action) and select the correct answer using the codes given below the lists ||| |---|---| | List I | List II | | A. 9 : 6 : 1 | 1. Duplicate gene action | | B. 12 : 3 : 1 | 2. Supplementary gene action | | C. 9 : 3 : 4 | 3. Inhibitory gene action | | D. 13 : 3 | 4. Masking gene action | | | 5. Polymeric gene action |

  1. A-3 B-2 C-1 D-5

  2. A-5 B-2 C-1 D-3

  3. A-5 B-4 C-2 D-3

  4. A-3 B-4 C-2 D-5
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

9:6:1 is duplicate gene action (two genes with similar effects), 12:3:1 is supplementary gene action (dominant allele at one locus masks expression at another), 9:3:4 is inhibitory gene action (one gene inhibits another), 13:3 is suppressor gene action (one gene suppresses another). The correct matching is A-5, B-4, C-2, D-3.

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