Question

Which theory explains polyembryony through the release of chemical stimuli from degenerating cells?

Options

• Necrohormone (Neochromosome) Theory

• Multiple Embryo Sac Theory

• Recessive Gene Theory

• Cleavage Theory

Answer 1

The Necrohormone (Neochromosome) Theory, proposed by Haberlandt in 1921–22, explains polyembryony through the release of chemical stimuli (necrohormone) from degenerating cells of the nucellus, which triggers adjacent nucellar cells to divide and develop into adventive embryos. This theory provides a physiological mechanism for understanding nucellar polyembryony development.