Question

Tall pea plants are dominant over short pea plants. 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?.a. 200. b. 300. c. 600. d.1,000

Answer 1

The right answer for the given question is 600.(C) 

Answer 2

The correct answer would be c. 600

In Mendelian genetics, the genotypic ratio of F₂ generation is 1:2:1 and the phenotypic ratio of the same is 3 (dominant) : 1 (recessive).

Thus, tall and short plants in F₂ generation would also be in 3 (tall) : 1 (short).

Hence, there must be 600 tall plants (3 x 200) if there were 200 short plants.

The cross of the same is shown below in the attached figure.