El Graduado
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Both the cacao and the durian share a common progenitor. They diverged 65 million years ago. The durian essentially cloned itself, duplicating its genes (it has twice as many as man), keeping the progenitor’s genes intact and letting the cloned set mutate. The cloned set quadrupled one type of gene (the methionine γ-lyase class) that regulates the production of volatile Sulphur compounds, which make up part of the putrid smell (cacao only has one of these Sulphur-regulating genes). There are over 50 other genes involved in producing the smell for a durian, and mutations in humans have also affected the way different people perceive these volatile compounds.
Or, as horn344 says, it just smells bad to him, period.
Or, as horn344 says, it just smells bad to him, period.