Question

when mendel crossed the two hybrid purple plants, what percent of the offspring had the recessive form of the trait? 100 75 25 0 50

Explanation:

Step1: Recall Mendel's Cross

Hybrid purple plants are heterozygous (let's say \( Pp \), where \( P \) is dominant purple, \( p \) is recessive white). Crossing two \( Pp \) plants: \( Pp \times Pp \).

Step2: Use Punnett Square

The Punnett square for \( Pp \times Pp \) gives genotypes: \( PP \), \( Pp \), \( Pp \), \( pp \). So 1 out of 4 (\( pp \)) shows the recessive trait.

Step3: Calculate Percentage

To find the percentage, \(\frac{1}{4} \times 100 = 25\%\).

Answer:

25 (corresponding to the option with 25)