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 determine how many types of gametes an F1 plant (produced from a cross between a tall plant with rounded seeds and a dwarf plant with wrinkled seeds) would produce, we can follow these steps:

### Step 1: Identify the Genotypes of the Parent Plants
The tall plant with rounded seeds has the genotype TTRR (homozygous dominant for both traits), while the dwarf plant with wrinkled seeds has the genotype ttrr (homozygous recessive for both traits).

### Step 2: Determine the Gametes of the Parent Plants
The gametes produced by the tall plant (TTRR) will be TR (since both alleles are the same). The gametes produced by the dwarf plant (ttrr) will be tr (again, both alleles are the same).

### Step 3: Perform the Cross to Find the F1 Generation
When we cross the gametes from the two parent plants:
- Tall plant (TR) x Dwarf plant (tr) results in:
- All offspring will have the genotype TtRr (heterozygous for both traits).

### Step 4: Determine the Gametes of the F1 Generation
The F1 plant with the genotype TtRr can produce gametes by separating the alleles:
- The possible combinations of alleles from TtRr are:
- TR
- Tr
- tR
- tr

### Step 5: Count the Types of Gametes
From the combinations above, we can see that the F1 plant can produce 4 different types of gametes:
1. TR
2. Tr
3. tR
4. tr

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

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