In summer squash, white fruit color (W) is completely dominant over yellow fruit color (w). Show your

Question

work in a punnett square for the following questions.
a. If you cross a yellow summer squash with a homozygous dominant white squash.
i. What is the phenotypic ratio? _________________________ ii. What is the genotypic ratio? _________________________
b. If you cross a yellow summer squash with a heterozygous white squash.
i. What percentage of offspring will be white? _________________________ ii. What percentage of offspring will be yellow? _________________________

Answer 1

a.

i. Phenotypic ratio: 100% white summer squash
ii. Genotypic ratio: 100% Ww (heterozygous white) summer squash

Punnett square:
| W | W |
| Ww | Ww |
| w | w |
__________________
Ww | WW | WW |
__________________
w | Ww | Ww |
__________________

b.

i. 50% of offspring will be white
ii. 50% of offspring will be yellow

Punnett square:
| W | w |
| Ww | Ww |
| w | w |
__________________
w | Ww | ww |
__________________

Answer 2

Ratio?

Answer 3

Apologies for the confusion. Here are the corrected ratios:

a.

i. Phenotypic ratio: 100% white summer squash
ii. Genotypic ratio: 100% Ww (heterozygous white) summer squash

b.

i. 50% of offspring will be white
ii. 50% of offspring will be yellow