In carnations, the allele for red pigmentation (R) is dominant to the allele for no pigmentation (r). Carnations with no pigmentation appear white in color.
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A cross between a red carnation and a white carnation produces pink carnations. Which of the following is true?

This is an example of simple dominance.
This is an example of incomplete dominance.
The parent carnations are both homozygous dominant.
The parent carnations are both homozygous recessive.