Introduction to Population Biology Dick Neal


Figure 12.1: Kernel colour in the F2 generation of a cross between a white and a dark red variety of wheat. The colour difference is assumed to be due to 3 gene loci, and each red allele is denoted red circle and each while allele is denoted black circle. The 64 possible combinations of alleles are grouped into the seven possible phenotypes, which occur in the proportions shown.


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