Chapter 19: Measuring Selection: Figure P19.2 - Differences in color pattern between two geographic races of the butterfly <i>Heliconius erato</i> are determined mainly by three loci.

Figure P19.2

Figure P19.2. Differences in color pattern between two geographic races of the butterfly Heliconius erato are determined mainly by three loci. The three genotypes dd, Dd, DD can all be distinguished (top; these are sd/sd, Cr), but alleles sd and cr are recessive (bottom; these four genotypes are dd, which has no rays on the hindwing).

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