Alfred Kühn (1885-1968) and developmental evolution.

Alfred Kühn (1885-1968) was known as one of the most comprehensive zoologists of his time. His research program in developmental physiological genetics was one of the first successful attempts to integrate the experimental study of development and heredity. It led him to discover the first known reaction chain from gene to phenotype. Kühn also foresaw many elements of modern evolutionary developmental biology and as a student of Weismann and mentor to many developmental geneticists of the late 20th century directly connects Weismann with molecular developmental genetics.
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