MHT CET 202623 AprilMorning Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 23 April
- Shift
- Morning Shift
- Subject
- Biology
- Chapter
- Principles of Inheritance and Variation
MHT CET 2026 · 23 April · Morning Shift · Biology · Principles of Inheritance and Variation
A pea plant with genotype RrYy is crossed with another pea plant...
A pea plant with genotype RrYy is crossed with another pea plant with genotype rryy. What will be the number of phenotypes obtained by this cross?
Options
- A
- B
- C
- D
Correct answer
D.
Step-by-step solution
The given cross is between a dihybrid plant (RrYy) and a homozygous recessive plant (rryy).
This is a dihybrid test cross.
The plant with genotype RrYy produces four types of gametes: RY, Ry, rY, and ry.
The plant with genotype rryy produces only one type of gamete: ry.
The offspring produced from this cross will have the following genotypes and phenotypes:
RrYy : Round Yellow
Rryy : Round Green
rrYy : Wrinkled Yellow
rryy : Wrinkled Green
Thus, four different phenotypes are obtained in a ratio of .
Answer:
This is a dihybrid test cross.
The plant with genotype RrYy produces four types of gametes: RY, Ry, rY, and ry.
The plant with genotype rryy produces only one type of gamete: ry.
The offspring produced from this cross will have the following genotypes and phenotypes:
RrYy : Round Yellow
Rryy : Round Green
rrYy : Wrinkled Yellow
rryy : Wrinkled Green
Thus, four different phenotypes are obtained in a ratio of .
Answer: