When a tall plant with rounded seeds (TTRR) is crossed with a dwarf plant with wrinkled seeds (ttrr), the `F_(1)` generation consists of tall plants with rounded seeds. How many types of gamets an `F_(1)` plant would produce

Options

A. One
B. Three
C. Four
D. Eight

Answer

To solve the problem of how many types of gametes an F1 plant would produce when a tall plant with rounded seeds (TTRR) is crossed with a dwarf plant with wrinkled seeds (ttrr), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Genotypes of the Parents**:
- The tall plant with rounded seeds has the genotype TTRR.
- The dwarf plant with wrinkled seeds has the genotype ttrr.

2. **Determine the Gametes of Each Parent**:
- The tall plant (TTRR) can produce gametes with the alleles TR (since it is homozygous for both traits).
- The dwarf plant (ttrr) can produce gametes with the alleles tr (since it is also homozygous for both traits).

3. **Cross the Gametes to Form the F1 Generation**:
- When we cross the gametes from both parents, we get the following combinations:
- TR (from TTRR) with tr (from ttrr) results in TtRr.
- Therefore, all F1 plants will have the genotype TtRr, which means they are heterozygous for both traits.

4. **Determine the Number of Types of Gametes Produced by the F1 Generation**:
- The F1 plant TtRr can produce gametes by combining the alleles:
- The possible combinations are:
- TR
- Tr
- tR
- tr
- Thus, the F1 plant can produce 4 different types of gametes.

5. **Conclusion**:
- The F1 generation consists of tall plants with rounded seeds (TtRr) and can produce a total of 4 types of gametes.

### Final Answer:
The F1 plant would produce **4 types of gametes**.

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