Question

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
A. The person is heterozygous for the first character and homozygous for the second.

B. The person is homozygous for the first character and heterozygous for the second.

C. The person is homozygous for both characters.

Answer 1

The person is heterozygous for the first character and homozygous for the second.
An organism is homozygous, if it carries two copies of the same dominant allele of a gene and Heterozygous means that an organism has two different alleles of a gene.

Answer 2

The person is heterozygous for the first character and homozygous for the second