D. at least one parent must have dimples and pass on the dominate allele
Explanation:
If you were to make a punet square with the alleles, only one parent would need the dominate allele to pass on the dimples to their offspring. If you you used DD, and dd in the punet square, the outcome would be 100% of the offspring would have simples. If Dd and dd were used in the punet square, 50% of the offspring would have dimples. If Dd and Dd were used, 75% of the offspring would have dimples.
