Question

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

• A. Lamarck's principle
• B. Mendelian principle
• C. Biogenetic law
• D. Hardy Weinberg law

Answer 1

Answer: (C)

Biogenetic law

Answer 2

Biogenetic law or Recapitulation theory was given by Ernst Haeckel in $1866$. It states that 'ontogeny repeats phylogeny'. Ontogeny is the life history of an organism while phylogeny is the evolutionary history of the race of that organism. This means that an organism repeats its ancestral history during its development