Figure 6.

Darwin's table summarizing the results of Primula crosses. Note especially the last line referring to the Primula auricula data, where the recessive and dominant forms respectively are cited as occurring in a 1:3 ratio in crosses between heterozygous dominant (short-styled) individuals. Reproduced from [5].

Howard Journal of Biology 2009 8:15   doi:10.1186/jbiol123
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