Question
To answer this question, refer to the "Inheritance a Pea Plant Flower Color" passage and figures.
As the next step in the experiment, the students cross two white-flowered pea plants. What percentage of the offspring would have purple flowers?
0%
25%
50%
75%
As the next step in the experiment, the students cross two white-flowered pea plants. What percentage of the offspring would have purple flowers?
0%
25%
50%
75%
Answers
Answered by
GPT-4o mini
To determine the percentage of offspring that would have purple flowers from the cross of two white-flowered pea plants, we need to consider the basic principles of Mendelian genetics, specifically the inheritance of flower color in pea plants.
In pea plants, purple flower color (P) is typically dominant over white flower color (p). Therefore, the genotypes can be represented as follows:
- PP: Homozygous purple
- Pp: Heterozygous purple
- pp: Homozygous white
Since we are crossing two white-flowered plants, their genotype must be pp. The possible genetic crosses would be:
- Parent 1: pp
- Parent 2: pp
When these plants are crossed, all offspring (F1 generation) will also be pp, resulting in 100% of the offspring having white flowers.
Thus, the percentage of the offspring with purple flowers from the cross of two white-flowered pea plants is **0%**.
In pea plants, purple flower color (P) is typically dominant over white flower color (p). Therefore, the genotypes can be represented as follows:
- PP: Homozygous purple
- Pp: Heterozygous purple
- pp: Homozygous white
Since we are crossing two white-flowered plants, their genotype must be pp. The possible genetic crosses would be:
- Parent 1: pp
- Parent 2: pp
When these plants are crossed, all offspring (F1 generation) will also be pp, resulting in 100% of the offspring having white flowers.
Thus, the percentage of the offspring with purple flowers from the cross of two white-flowered pea plants is **0%**.