In a certain plant species, the allele for wrinkled seeds (W) is dominant to the allele for smooth seeds. What is the phenotype result of a cross between a true-breeding wrinkle-seeded group of plants and a true-breeding smooth-seeded group of plants?

A.
1/4 wrinkled seeds, 3/4 smooth seeds

B.
all smooth seeds, no wrinkled seeds

C.
1/4 smooth seeds, 3/4 wrinkled seeds

D.
all wrinkled seeds, no smooth seeds

Question

In a certain plant species, the allele for wrinkled seeds (W) is dominant to the allele for smooth seeds. What is the phenotype result of a cross between a true-breeding wrinkle-seeded group of plants and a true-breeding smooth-seeded group of plants?
 
 A.
1/4 wrinkled seeds, 3/4 smooth seeds
 
 B.
all smooth seeds, no wrinkled seeds
 
 C.
1/4 smooth seeds, 3/4 wrinkled seeds
 
 D.
all wrinkled seeds, no smooth seeds  <=======My Guess

aaronq · Answer

yup the wrinkled parent can only give W and the smooth can only give w.

All offspring are Ww, and thus express the wrinkled phenotype