Question

4. In snapdragons, neither the red allele or the white allele for flower color is dominant. The heterozygote is pink in color. (Use RR for red, Rr for pink and rr for white). Predict the genotype and phenotype ratios that result from this cross:

pink x pink

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Answer 1

In snapdragons, the genotypic ratio for a cross between two pink flowers (Rr) would be 1 RR : 2 Rr : 1 rr, and the phenotypic ratio would be 1 red : 2 pink : 1 white.

Step-by-step explanation:

In snapdragons, the red allele (RR) and the white allele (rr) are not dominant. The heterozygote (Rr) is pink in color. When two pink snapdragons are crossed, the possible genotypes and phenotypes can be determined using a Punnett square.

The genotypic ratio would be 1 RR : 2 Rr : 1 rr, and the phenotypic ratio would be 1 red : 2 pink : 1 white. This means that there is a 1/4 chance of getting a red flower, a 1/2 chance of getting a pink flower, and a 1/4 chance of getting a white flower.