6. Dihybrid crosses. A pea plant that is heterozygous for seed form and flower color is crossed with a heterozygous seed shape and white flower plant. Predict the geno- type and the phenotype of the first filial (F1) generation. (Use a Punnet table.)

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**Activity 10.2: Genetics Problems**

Use the following information about pea plants from Mendel's experiments:

| Dominant Trait    | Recessive Trait       |
|-------------------|-----------------------|
| S = spherical seeds  | s = wrinkled seeds     |
| Y = yellow seeds     | y = green seeds        |
| P = purple flowers   | p = white flowers      |
| I = inflated pods    | i = constricted pods   |

This table illustrates the dominant and recessive traits observed in Mendel's pea plant experiments, with dominant traits listed in the left column and corresponding recessive traits in the right column.
Transcribed Image Text:**Activity 10.2: Genetics Problems** Use the following information about pea plants from Mendel's experiments: | Dominant Trait | Recessive Trait | |-------------------|-----------------------| | S = spherical seeds | s = wrinkled seeds | | Y = yellow seeds | y = green seeds | | P = purple flowers | p = white flowers | | I = inflated pods | i = constricted pods | This table illustrates the dominant and recessive traits observed in Mendel's pea plant experiments, with dominant traits listed in the left column and corresponding recessive traits in the right column.
**Dihybrid Crosses: Predicting Genotype and Phenotype**

**Problem Statement:**
A pea plant that is heterozygous for seed form and flower color is crossed with another plant that is heterozygous for seed shape but has white flowers. Predict the genotype and the phenotype of the first filial (F1) generation using a Punnett square.

**Diagram Explanation:**
The diagram you see is a blank Punnett square designed for a dihybrid cross, containing 16 boxes. This allows for the examination of two different traits simultaneously, each with two alleles. Here’s how each part of the grid works:

- **Top Row:** Represents the gametes from one parent. Each circle will eventually contain a combination of alleles for seed shape (R/r for round/wrinkled) and flower color (Y/y for yellow/white).
  
- **Left Column:** Represents the gametes from the other parent, similarly containing a combination of seed form and flower color alleles.

- **Middle Grid:** Each of the 16 squares will be filled with a combination of the alleles from the intersecting row and column gametes. This allows prediction of the genotypes and phenotypes of the offspring.

By analyzing the completed Punnett square, you are able to determine the probability of each genotype and phenotype in the F1 generation. For a heterozygous cross, you typically expect a variety of combinations depending on the dominant and recessive nature of the alleles involved.
Transcribed Image Text:**Dihybrid Crosses: Predicting Genotype and Phenotype** **Problem Statement:** A pea plant that is heterozygous for seed form and flower color is crossed with another plant that is heterozygous for seed shape but has white flowers. Predict the genotype and the phenotype of the first filial (F1) generation using a Punnett square. **Diagram Explanation:** The diagram you see is a blank Punnett square designed for a dihybrid cross, containing 16 boxes. This allows for the examination of two different traits simultaneously, each with two alleles. Here’s how each part of the grid works: - **Top Row:** Represents the gametes from one parent. Each circle will eventually contain a combination of alleles for seed shape (R/r for round/wrinkled) and flower color (Y/y for yellow/white). - **Left Column:** Represents the gametes from the other parent, similarly containing a combination of seed form and flower color alleles. - **Middle Grid:** Each of the 16 squares will be filled with a combination of the alleles from the intersecting row and column gametes. This allows prediction of the genotypes and phenotypes of the offspring. By analyzing the completed Punnett square, you are able to determine the probability of each genotype and phenotype in the F1 generation. For a heterozygous cross, you typically expect a variety of combinations depending on the dominant and recessive nature of the alleles involved.
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