The correct option is
C dominant trait for one character and recessive for the other
Let’s consider Mendel’s dihybrid cross in which two pea plants pureline for producing round, yellow seeds (RRYY) and wrinkled, green seeds (rryy) are crossed.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1102196/original_01.JPG)
F2 generation:-
GametesRYRyrYryRYRRYYRRYyRrYYRrYy(Round, yellow)(Round, yellow)(Round, yellow)(Round, yellow)RyRRYyRRyyRrYyRryy(Round, yellow)(Round, green)(Round, yellow)(Round, green)rYRrYYRrYyrrYYrrYy(Round, yellow)(Round, yellow)(Wrinkled, yellow)(Wrinkled, Yellow)ryRrYyRrYyrrYYrrYy(Round, yellow)(Round, green)(Wrinkled, yellow)(Wrinkled, green)
In F2 generation, the progenies producing round, yellow seeds and those producing wrinkled, green seeds display parental phenotypes. Any deviations from these characters are classified under non parental phenotypes. Non- parental phenotypes include progeny plants producing yellow, wrinkled seeds and green, round seeds.
As observed in the cross above, the genotypes of the non-parental phenotypes are mentioned as follows:
Non-parental phenotypeCorresponding genotype of the plant exhibiting the phenotypeYellow, wrinkled seedsYYrrYyrrGreen, round seedsyyRRyyRr
For both the non-parental characters, the genotype of one of the characters is dominant while that of the other is recessive.
Hence, non parental phenotypes in F2 generation of dihybrid cross show dominant trait for one character and recessive for the other.
This is due to an independent assortment of chromosomes during meiosis.