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In a particular plant, two genes control...

In a particular plant, two genes control leaf shape and color. Round leaves (R) are dominant to jagged leaves . Yellow fruits (Y) are dominant to white fruits (y). A true-breeding round-leaved, yellow-fruited plant is mated with a jagged-leaved, white-fruited plant. What are the genotypes of the plants involved in this cross?

A

RRYY X RRYY

B

RRYY x rryy

C

RrYy x RrYy

D

RrYy x rryy

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem regarding the genotypes of the plants involved in the cross, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Traits and Their Alleles**: - Leaf shape: Round leaves (R) are dominant to jagged leaves (r). - Fruit color: Yellow fruits (Y) are dominant to white fruits (y). 2. **Determine the Genotype of the True-Breeding Round-Leaved, Yellow-Fruited Plant**: - Since this plant is true-breeding for both traits, it must be homozygous for each dominant trait. - Therefore, the genotype for the round leaves is **RR** and for the yellow fruits is **YY**. - Thus, the genotype of this plant is **RRYY**. 3. **Determine the Genotype of the Jagged-Leaved, White-Fruited Plant**: - This plant exhibits the recessive traits for both leaf shape and fruit color. - Therefore, the genotype for the jagged leaves is **rr** and for the white fruits is **yy**. - Thus, the genotype of this plant is **rryy**. 4. **Summarize the Genotypes of Both Parents**: - The true-breeding round-leaved, yellow-fruited plant has the genotype **RRYY**. - The jagged-leaved, white-fruited plant has the genotype **rryy**. ### Final Answer: - The genotypes of the plants involved in this cross are: - True-breeding round-leaved, yellow-fruited plant: **RRYY** - Jagged-leaved, white-fruited plant: **rryy** ---
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