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.
<span>The person is heterozygous for the first character and homozygous for the second. </span>An organism is homozygous, if it carries two copies of the same dominant allele of a gene and Heterozygous<span> means that an organism has two different alleles of a gene.</span>
The answer is a C. The offsprings from this generation are from a cross between parents who are heterozygous (one parent) and homozygous recessive. This means that all the offsprings of the filial 1 (one) generation will carry a recessive allele. However, those with an equivalent dominant allele will not exhibit the attached earlobe trait. This is shown by the Punnet square below;
