A pea plant with wrinkled peas is crossed with a pea plant with smooth peas. All of the offspring produced have wrinkled peas. What can be inferred about the wrinkled pea trait? A) It is recessive.
B) The smooth and wrinkled traits are codominant.
C) The plant is a hybrid.
D) It is dominant.

D. It is dominant

Explanation:

A dominant trait will always be the one portrayed as long as it is in the genes. Think of it as an override. It is the reason 2 brown-eyed people can have a blue-eyed child. The Punnett square is always the first thing I think of when it comes to genes.

  |  W   |   W |

w| Ww | Ww |

w| Ww | Ww |

This is what the Punnett Square for your peas would look like, between a homo Dominant plant and a homo Recessive plant.