In a plant flower colour is the example of quantitative trait and controlled by one gene pair. How many plants show parental phenotype in F2 generation ?

1 2/16
2 2/4
3 2/64
4 2/256

Dear student,
Please find below the solution to the asked query

The correct option is 2.
This can be explained by the flower colour of Snapdragon where incomplete dominance takes place. Suppose the pair of gene that controls flower colour is R - r. Then by crossing the homozygous parents RR and rr, following results in F2 generation will be obtained. 

From the above cross, it is clear that only two offsprings in F2 generation i.e RR (red) and rr (white) resemble the parents in phenotype. 

Hope this information will clear your doubts about the parental phenotype in F2 generation in the given cross.
If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible.

  • 5
1st option
  • 3
What are you looking for?