Question 4
Incomplete dominance is shown in the fruitloop flower, WW are white, RR are red and WR are pink.
Use scratch paper to set up a Punnett square for a cross of two of the F1 generation (pink flowers).
What is the percentage of white flowered offspring in the F2 generation of the cross between two pink flowering fruitloop plants?
Red
White
parents
X
F1
All Pink
100% white
75% white
50% white
25% white
0% white
Ob
Od
To set up a Punnett square for a cross between two pink flowered fruitloop plants (WR x WR), we would have:
W W
R WR WR
R WR WR
From the Punnett square, we can see that 25% of the offspring will have the genotype WW, which results in white flowers.
Therefore, the percentage of white flowered offspring in the F2 generation of the cross between two pink flowering fruitloop plants is 25%.