Answer :
In this cross between two true-breeding pea strains, yellow and green, all of the F1 progeny are yellow. This indicates that the yellow trait is dominant ,the true-breeding yellow and green pea strains are crossed, all of the F1 progeny will be yellow. This indicates that the yellow trait is dominant over the green trait.
Dominant traits are expressed in the offspring even if only one parent passes on the gene for that trait. In this case, the yellow pea strain is dominant over the green pea strain. Therefore, when the yellow and green strains are crossed, all of the F1 progeny will inherit the yellow trait the yellow trait is dominant, it masks the expression of the green trait, resulting in all of the F1 progeny appearing yellow.
To further understand dominant traits, let's consider the genetic makeup of the yellow and green pea strains. The yellow strain is homozygous for the yellow trait, meaning it has two copies of the yellow allele (YY), while the green strain is homozygous for the green trait, having two copies of the green allele (gg). When these two strains are crossed, the F1 progeny inherit one copy of the yellow allele from the yellow parent and one copy of the green allele from the green parent (Yg).
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