Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent paragraph.

A. Mendel's simple 'Laws of heredity' came to be widely known and were uncritically assumed to apply to all human characteristics.
B. With Charles Darwin's popularisation of the concept of evolution, man became interested in his biological origins and affiliations.
C. Starting with the work on heredity of Gregor Mendel in the 1860s and the recognition of its significance in 1900, interest shifted to the problem of man's ontogenetic origins.
D. This interest was centred on man's phylogenetic origins.