Question

4. Crossing spherical-seeded pea plants with wrinkled-seeded pea plants resulted in progeny that all had spherical seeds. This indicates that the wrinkled-seed trait is
a. codominant.
b. dominant.
c. recessive.
d. a and b
e. a and c

Answer 1

Dominant because all the progeny in the F1 are one of the parents, so it is claiming that is it a the dominant trait.
In genetics, a trait that will appear in the offspring if one of the parents contributes it. (Compare recessive trait.)

•In humans, dark hair is a dominant trait; if one parent contributes a gene for dark hair and the other contributes a gene for light hair, the child will have dark hair.