Dimpled chin and free earlobes are two dominant characters in humans. Smooth chin and attached earlobes are recessive characters. A person has the genotype Ddff. Which of the following statements is correct with respect to this genotype? The person is heterozygous for the first character and homozygous for the second./ The person is homozygous for the first character and heterozygous for the second. /The person is homozygous for both characters.