What is ABC hypothesis in Biology?

Learn ABC hypothesis definition in biology with explanation to study “What is ABC hypothesis”. Study abc hypothesis explanation with biology terms to review biology course for online degree programs.

ABC hypothesis Definition

  • ABC hypothesis of flower formation proposes that three classes of genes direct the formation of the four types of floral organs.

    Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson

ABC hypothesis Explanation

The ABC model, which aims to describe the biological basis of the process from the perspective of molecular and developmental genetics. It is a scientific model of the process by which flowering plants produce a pattern of gene expression in meristems that leads to the appearance of an organ oriented towards sexual reproduction, a flower. There are three physiological developments that must occur in order for this to take place: firstly, the plant must pass from sexual immaturity into a sexually mature state (i.e. a transition towards flowering); secondly, the transformation of the apical meristem's function from a vegetative meristem into a floral meristem or inflorescence; and finally the growth of the flower's individual organs.

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