`F_(1)` plants crossed with dominant individuals will yield a progeny of

Options

A. All recessive
B. All dominants
C. Dominant and recessive in the ratio of 1:1
D. Dominant and recessive in the ratio of 3:1

Answer

To solve the question about the progeny resulting from crossing F1 plants with dominant individuals, we will follow these steps:

### Step 1: Identify the Traits
We need to determine the traits involved in the cross. In this case, we are considering the trait of height, where tall (T) is dominant over short (t).

### Step 2: Define the F1 Generation
The F1 generation is typically heterozygous for the trait, meaning it has one dominant allele and one recessive allele. Therefore, the F1 plants can be represented as Tt (tall).

### Step 3: Identify the Dominant Individual
The dominant individual in this case is homozygous for the dominant trait, which can be represented as TT (tall).

### Step 4: Set Up the Cross
We will cross the F1 plant (Tt) with the dominant individual (TT).

### Step 5: Determine the Gametes
- The F1 plant (Tt) can produce two types of gametes: T and t.
- The dominant individual (TT) can produce only one type of gamete: T.

### Step 6: Use a Punnett Square
We can set up a Punnett square to visualize the possible combinations of alleles from the gametes:

```
T T
----------------
T | TT | TT |
----------------
t | Tt | Tt |
----------------
```

### Step 7: Analyze the Progeny
From the Punnett square, we can see the resulting genotypes of the progeny:
- 2 TT (homozygous tall)
- 2 Tt (heterozygous tall)

### Step 8: Determine the Phenotypes
All the progeny (TT and Tt) will exhibit the tall phenotype since tall is the dominant trait.

### Conclusion
Thus, when F1 plants (Tt) are crossed with dominant individuals (TT), the progeny will all be tall.

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