what is the phenotype of a plant with the genotype rw

In genetics, particularly with flower color inheritance in plants like four o'clocks or snapdragons, the genotype RW typically results in a pink phenotype due to incomplete dominance.

This means neither the R (red) nor W (white) allele fully dominates; instead, they blend to produce an intermediate color.

Genetic Background

Incomplete dominance occurs when heterozygous offspring (RW) show a mixed trait, unlike complete dominance where one allele masks the other.
Classic examples include crossing red (RR) and white (WW) plants, yielding all pink (RW) F1 offspring.

Here, R codes for red pigment production, W for none, so RW plants produce partial pigment for pink flowers.

Phenotype Possibilities

While most sources confirm pink as the RW phenotype, rare contexts suggest variability:

• If R dominates fully: red flowers.

• If W dominates: white flowers.

• Standard biology textbooks emphasize pink via blending.

Genotype| Phenotype (Incomplete Dominance)| Example Plant
---|---|---
RR| Red| Snapdragons
RW| Pink| Four o'clocks
WW| White| Snapdragons

Real-World Context

This pattern explains variegated flower colors in gardens today.
As of 2026, it's a staple in high school curricula and breeding programs for hybrid flowers.

Fun fact: Gregor Mendel's pea plants showed complete dominance, but later discoveries like this added nuance to inheritance.

TL;DR: The phenotype is pink.

Information gathered from public forums or data available on the internet and portrayed here.