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In general, in the developmental history of a mammalian heart, it is observed that it passes through a two-chambered fish-like heart, three-chambered frog-like heart and finally to four-chambered stage. To which hypothesis can this above cited statement be approximated?

1. Hardy-Weinberg Law
2. Lamarck's Principle
3. Biogenetic Law
4. Mendelian Principles

Correct answer: Biogenetic Law

Solution

The statement describes ontogeny recapitulating phylogeny: the developing mammalian heart appears to pass through stages resembling ancestral vertebrate hearts. That is the core idea of the Biogenetic Law.

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