Question

some flowers are controlled by codominance. red flowers (rr), blue flowers (bb) and speckled flowers (rb). cross a red flower with a speckled flower. what is the phenotypic ratio? 2 red, 2 blue; 2 blue, 2 speckled; 2 red, 2 speckled

Explanation:

Step1: Identify parent genotypes

Red flower: $RR$, Speckled flower: $RB$

Step2: Set up Punnett square

$$\begin{array}{c|cc} & R & R \\ \hline R & RR & RR \\ B & RB & RB \\ \end{array}$$

Step3: Count phenotypes

2 red ($RR$), 2 speckled ($RB$)

Answer:

2 red, 2 speckled