the genotype of the hybrids of two pure-breeding pea plants that each have white flowers and round seeds (both traits dominant) would be?

To determine the genotype of the hybrids, we need to understand the principles of Mendelian genetics and observe the traits of pure-breeding pea plants.

In this case, both pea plants have the same genotype, where white flowers and round seeds are dominant traits. Let's represent the dominant traits with capital letters (W for white flowers and R for round seeds) and the recessive traits with lowercase letters (w for non-white flowers and r for non-round seeds).

Since both parents are pure-breeding, they can be represented as WWRR (pure white flowers and round seeds). When these plants reproduce, each parent contributes one allele for each trait to their offspring.

The possible combinations of the alleles in offspring resulting from the cross of two parents WWRR would be:

1. W allele from one parent and W allele from the other parent (for flower color)
2. R allele from one parent and R allele from the other parent (for seed shape)
3. W allele from one parent and R allele from the other parent (for one trait each)

Therefore, the genotype of the hybrids from these two pure-breeding pea plants would be WwRr, indicating that the hybrids would have white flowers and round seeds.