Question

in some carnations, flower color exhibits codominance. when crosses, red (r) and white (w) flowers make speckled flowers (rw) that show both colors. complete a cross between a speckled flower and a red flower. find the phenotype ratio. 2 red: 2 speckled: 0 white; 0 red: 2 speckled: 2 white; 4 red: 0 speckled: 0 white; 0 red: 4 speckled: 0 white

Explanation:

Step1: Identify parent genotypes

Speckled flower: $RW$, Red flower: $RR$

Step2: Set up Punnett square

$$\begin{array}{c|cc} & R & W \\ \hline R & RR & RW \\ R & RR & RW \\ \end{array}$$

Step3: Count phenotype ratios

Red ($RR$): 2, Speckled ($RW$): 2, White ($WW$): 0

Answer:

2 red: 2 speckled: 0 white