Question

question 3
mc color in snapdragon flowers is incompletely dominant. a pink plant crossed with a pink plant would yield:
a 1/2 red, 1/2 white
b 1/2 white, 1/2 pink
c all pink
d 1/2 red, 1/2 pink
e all white
f all red
g 1/4 red, 2/4 pink, 1/4 white

Explanation:

Step1: Determine the genotype of pink snapdragon

In incomplete dominance, if \(R\) represents the allele for red and \(r\) represents the allele for white, the genotype of pink (the intermediate phenotype) is \(Rr\).

Step2: Set up the Punnett square

When crossing \(Rr\times Rr\), the Punnett square has the following combinations:

Gametes of Parent 1	Gametes of Parent 2
\(R\)	\(RR\) (red)	\(Rr\) (pink)
\(r\)	\(Rr\) (pink)	\(rr\) (white)

Step3: Calculate the phenotypic ratios

From the Punnett square, \(RR:Rr:rr = 1:2:1\). So the phenotypic ratio is \(\frac{1}{4}\) red (\(RR\)), \(\frac{2}{4}\) pink (\(Rr\)), \(\frac{1}{4}\) white (\(rr\))

Answer:

G. \(1/4\) red, \(2/4\) pink, \(1/4\) white