FEW CONTROLLING GENES. “Floral traits are sometimes controlled by a relatively small number of genes. For example, in the common morning glory (Ipomoea purpurea), various aspects of pigmentation are controlled by single loci: one locus determines pink versus blue flowers, another controls intensity, a third controls the patterning and degree of pigmentation, and a fourth locus has epistatic effects on the other three loci.”
https://lnkd.in/dHD-ddW