Question

in pea plants, tall plant height is dominant over short plant height. if there are 200 short plants in the f2 generation from a cross that followed mendels methods, about how many plants will be tall in that generation?
200
300
600
1000

Explanation:

Step1: Recall Mendel's ratio

In a monohybrid cross following Mendel's methods, the phenotypic ratio of tall : short plants in the F2 generation is 3:1.

Step2: Set up proportion

Let $x$ be the number of tall plants. We have the proportion $\frac{x}{200}=\frac{3}{1}$.

Step3: Solve for $x$

Cross - multiply: $x = 3\times200$.
$x=600$.

Answer:

C. 600