Tall plant with round seeds (TTRR) is crossed with dwarf plant having wrinkled seeds (ttrr). `F_(1)` plants are tall with rounded seeds. Types of gametes produced by them would be

Options

A. one
B. Two
C. Three
D. Four

Answer

To solve the problem of determining the types of gametes produced by the F1 generation of a cross between a tall plant with round seeds (TTRR) and a dwarf plant with wrinkled seeds (ttrr), we can follow these steps:

### Step-by-Step Solution:

1. **Identify Parental Genotypes**:
- The tall plant with round seeds has the genotype TTRR.
- The dwarf plant with wrinkled seeds has the genotype ttrr.

2. **Determine Gametes from Parents**:
- The tall plant (TTRR) can produce only one type of gamete: TR (since both alleles are the same).
- The dwarf plant (ttrr) can also produce only one type of gamete: tr.

3. **Cross the Gametes**:
- When we cross the gametes from the two parents, we get the F1 generation. The only combination possible from TR and tr is:
- TR (from TTRR) x tr (from ttrr) = TtRr

4. **Identify the F1 Generation Genotype**:
- The F1 generation will have the genotype TtRr, which means they are heterozygous for both traits (tall vs. dwarf and round vs. wrinkled).

5. **Determine Gametes from F1 Generation**:
- The F1 plant (TtRr) can produce four types of gametes due to independent assortment:
- TR (Tall and Round)
- Tr (Tall and Wrinkled)
- tR (Dwarf and Round)
- tr (Dwarf and Wrinkled)

### Final Answer:
The types of gametes produced by the F1 plants (TtRr) are:
1. TR
2. Tr
3. tR
4. tr