LIFE SCIENCE

Detailed explanation-1: -ABC model was first formulated by George Haughn and Chris Somerville in 1988. Experimental material was Arabidopsis thaliana and Antirrhinum majus. ABC model predicts that the four whorls of flower are controlled by the action of 3 genes A, B and C in Arabidopsis thaliana.

Detailed explanation-2: -1: ABC model of flower development: Class A genes (blue) affect sepals and petals, class B genes (yellow) affect petals and stamens, class C genes (red) affect stamens and carpels.

Detailed explanation-3: -The ‘ABC model’ is a primary, simple and satisfying explanation of conserved floral architecture that genetically specifies the cells of the floral meristem. The ABC model was articulated in 1991 in a seminal paper by Enrico Coen and Elliot Meyerowitz.

Detailed explanation-4: -The ABC model of flower development in angiosperm demonstrates the presence of three classes of genes that regulate the development of floral organs. The genes are referred to as class A genes, class B genes and class C gene. These genes and the interaction between them induce the development of floral organs.