Inspired by Gregor Mendel, you visit a local greenhouse to see what a pea plant looks like in person. You spot a lone plant in the corner and immediately notice that it exhibits the green trait of the pod colour character. This character is controlled by one gene with two alleles, the dominant green G allele and the recessive yellow g allele.
Identify what you know for certain based on your observation. Check all that apply.
- You know the phenotype of the plant.
- This plant must be heterozygous with respect to the pod colour gene.
- You know the genotype of the plant.
- This plant has at least one copy of the G allele.
In another corner of the greenhouse, you find another pea plant. This plant, however, exhibits the yellow trait of the pod colour character. The greenhouse plant breeder approaches you and mentions that he has recently cross-fertilized the two plants. The seeds contained in the pods of both plants are the products of this cross-fertilization. The breeder then offers to let you know how the seeds turn out.
Without realizing it, the breeder is actually conducting a for you.
If you were able to examine hundreds of offspring from this cross, what ratio of green pods to yellow pods would you observe:
• If the green parent is Gg?
• If the green parent is GG?