Parent The red and white Incomplete color alleles of dominance Mirabilis jalapa show incomplete heterozygotes are intermediate R2R2 red white Heterozygous snapdragons(R/r) 1 generation The offspring of a cross between have an intermediate red(R'R')and color, pink white(RR2)have an intermed iate (pink phenotype. Crossing two pink RIR2 ink snapdragons gives a 1 RR: 2R/r: 1r/r F2 generation Selfing the RR2 progeny ratIo. heterozygotes gives F2 progeny with a phenotypic ratio of 1 red RR1 RR2 RR2 R2R2 2 pink: 1 white. red pink pink white 14 1h2 14• Incomplete dominance: heterozygotes are intermediate. • Heterozygous snapdragons (R/r) have an intermediate color, pink. • Crossing two pink snapdragons gives a 1 R/R: 2R/r: 1r/r progeny ratio. 4.1