In snapdragons, flower color is controlled by incomplete dominance. The two alleles are red (R) and white (W). The heterozygous genotype is expressed as pink. A pink-flowered plant (parent 1) is crossed with a white-flowered plant (parent 2). Parent's Genotype: parent 1 X parent 2

The genotype of the parents are:

Pink-flowered parent: Rr (heterozygous)

White-flowered plant: rr (true plant)

Explanation:

Incomplete dominance is the pattern of the inheritance where the dominant allele does not mask the effect of the recessive allele completely and results in a mix or blend of both alleles.

Similarly, here flower color is shows incomplete dominance which means Red flowers (RR) and white flowers (rr) where R is dominant over r. So, the pink color is a heterozygous condition that represents by Rr, a mix of both alleles.

Thus, the parent genotype are :

Rr - pink flower

rr - white flower

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