Question

A cross between a round, green seeded pea-plant (RRyy) and a wrinkled yellow seeded pea-plant (rrYY), the seeds produced in F₁, generation are

• A. Wrinkled and Yellow
• B. Wrinkled and Green
• C. Round and Yellow
• D. Round and Green

Answer 1

The Correct Option is C

To solve the problem, we need to determine the phenotype of seeds produced in the F₁ generation from a cross between a round, green-seeded pea plant (RRyy) and a wrinkled, yellow-seeded pea plant (rrYY).

1. Understanding the Traits and Dominance:
The given cross involves two traits:

• Seed shape: Round (R) is dominant over wrinkled (r).
• Seed color: Yellow (Y) is dominant over green (y).

The parental genotypes are:

• Round, green: RRyy
• Wrinkled, yellow: rrYY

2. Formation of Gametes:
Gametes formed from RRyy will carry the alleles: Ry
Gametes formed from rrYY will carry the alleles: rY

3. Crossing the Gametes:
Now, we cross the gametes Ry × rY, which produces the genotype RrYy in the F₁ generation.

4. Phenotype of the F₁ Generation:
Genotype RrYy will exhibit dominant traits:

• Rr: Round seeds (R dominant)
• Yy: Yellow seeds (Y dominant)

Hence, the phenotype is Round and Yellow.

Final Answer:
The seeds produced in the F₁ generation are Round and Yellow (Option C).