Question

In imaginary fruit, white fruit color (W) is dominant over yellow fruit color (w) and disk-shaped fruit (D) is dominant over sphere-shaped fruit (d). If a plant true-breeding for white, disk-shaped fruit is crossed with a plant true-breeding for yellow, sphere-shaped fruit, what will the phenotypic ratios be for: Show all work

Answer 1

See the answer below

Step-by-step explanation:

Genotype of a true-breeding white, disk-shaped fruit = WWDD

Genotype of a true-breeding yellow, sphere-shaped fruit = wwdd

Crossing the two:

WWDD x wwdd

WwDd

All the offspring (100%) will have the genotype WwDd with white, disk-shaped phenotype.

Assuming the cross is advanced to F2:

WwDd x WwDd

W_D_ 9 White, disk-shaped (9/16)

W_dd 3 White, sphere-shaped (3/16)

wwD_ 3 Yellow, disk-shaped (3/16)

wwdd 1 Yellow, sphere-shaped (1/16)

(See the attached image for the Punnet's square)