Two pea plants were subjected cross pollination. Of the 183 plants produced in the next generation, 94 plants were found to be tall and 89 plants were found to be dwarf. The genotypes of the two parental plants are likely to be:

Options

A. `T T xx t t`
B. `Tt xxTt`
C. `Tt xx t t`
D. `T T xx T T`

Answer

To determine the likely genotypes of the two parental pea plants based on the given data, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Problem**: We have two pea plants that were cross-pollinated, resulting in 183 offspring. Out of these, 94 plants are tall (dominant trait) and 89 plants are dwarf (recessive trait).

2. **Calculate the Ratios**:
- Total plants = 183
- Tall plants = 94
- Dwarf plants = 89
- Ratio of tall to dwarf plants = 94:89, which is approximately 1:1.

3. **Identify Dominance**:
- Tall (T) is the dominant trait, and dwarf (t) is the recessive trait. This means that any plant with at least one T allele will be tall.

4. **Consider Possible Genotypes**:
- The possible genotypes for the parental plants can be:
- Option A: TT (homozygous tall) and tt (homozygous dwarf)
- Option B: Tt (heterozygous tall) and Tt (heterozygous tall)
- Option C: Tt (heterozygous tall) and tt (homozygous dwarf)
- Option D: TT (homozygous tall) and TT (homozygous tall)

5. **Analyze the Offspring**:
- If we assume a test cross (crossing a heterozygous tall with a homozygous dwarf), we would expect a 1:1 ratio of tall to dwarf offspring.
- The observed ratio of tall to dwarf (94:89) is very close to 1:1, which suggests that one parent must be heterozygous (Tt) and the other must be homozygous recessive (tt).

6. **Conclusion**:
- The most likely genotypes of the parental plants are Tt (tall) and tt (dwarf). Therefore, the answer is Option C: Tt (tall) and tt (dwarf).