Question

A student crosses two true-breeding pea plants, one with green pods and the other with yellow pods. if yellow is dominant over green, what phenotypic results will the student find in the f1 generation?

Answer 1

The phenotypic results would be all yellow pods

in the f1 generation ONLY the DOMINANT trait is seen.

Answer 2

• True breeding plants are the ones which have identical alleles for a given trait. Thus, the plant with green pods will have genotype gg and the one with yellow pod will have the genotype GG.
• Now when these two plants are crossed, we get:
• GG X gg ----> Gg Gg Gg Gg
• Since yellow is dominant over the green, the phenotype of the heterozygote individual would be yellow.
• Thus, the offsprings in F1 having the genotype Gg will have the phenotype yellow pods.