Question

purple petal color in pea plants is dominant to white petal color. two heterozygous pea plants are crossed. what is the ratio of the offspring with white petals to the total number of offspring? \boxed{}:\boxed{} express this in a percentage. \boxed{}%

Explanation:

Step1: Determine Genotypes

Heterozygous plants have genotype \( Dd \). Crossing \( Dd \times Dd \), the Punnett square gives genotypes: 1 \( DD \), 2 \( Dd \), 1 \( dd \). White petals (recessive) are \( dd \), so 1 out of 4 offspring.

Step2: Calculate Ratio

Ratio of white to total: \( 1:4 \).

Step3: Calculate Percentage

Percentage = \( \frac{1}{4} \times 100 = 25\% \).

Answer:

Ratio: \( 1:4 \)
Percentage: \( 25\% \)