"Ponte", as he was known, even to his family, died in September 1999, aged 91, of complications following a fall whilst collecting mushrooms in his beloved Swiss mountains. He was the founder of the genetics of Aspergillus nidulans, and as a result of the discovery of the parasexual cycle, the originator of genetical studies in many other fungi. He made significant contributions to modern genetics in elucidating the divisibility of the gene by recombination, and in his later years in the application of parasexual techniques to mammalian cell cultures. He was also an irascible yet genial friend and adviser who attracted the great admiration of colleagues and students worldwide.

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