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 mendel’s methods, about how many plants will be tall in that generation?
○ 200
○ 300
○ 600
○ 1,000

Explanation:

Step1: Recall Mendel's ratio

For a monohybrid cross (tall vs short in pea plants), the F2 generation ratio of tall to short is 3:1 (dominant:recessive).

Step2: Let number of short plants be \( s = 200 \), tall plants be \( t \).

From ratio \( \frac{t}{s}=\frac{3}{1} \), so \( t = 3\times s \).

Step3: Substitute \( s = 200 \)

\( t = 3\times200 = 600 \).

Answer:

600