You cross purple-flowered and white-flowered pea plants, and all offspring are purple. how come? select one:

a. none of the answers provided are true

b. the white flower is dominant

c. the genes for purple and white flowers are blended

d. the offspring were heterozygous

To solve this problem on genetic dominance, we will need a punnet square.

Let's let P represent purple-flowered and p represent white-flowered.

We have one purple flowered plant with the alleles PP, and we have one white flowered plant with the alleles pp. Using a punnet square, we can determine the alleles of the offspring.

P P

p| Pp Pp

p | Pp Pp

As we can tell from our punnet square, all of our offspring will have purple flowers. This is because the purple-flower allele is dominant and the white-flowered allele is recessive.

Since each flower has a dominant and recessive allele, they are heterozygous.

Therefore, the solution to this problem is D.