While Doing a Pedigree Analysis of a European Royal Family

Multiple Choice

While doing a pedigree analysis of a European royal family, you notice a disease in a female child of two healthy parents. There are also some cousins with the same genetic disease. If this disease is controlled by a single gene, then the MOST likely explanation for these observations is that the disease is:

A) a spontaneous mutation.
B) recessive and only seen in homozygous recessive individuals such as the daughter.
C) dominant and only seen in homozygous dominant individuals such as the daughter.
D) only seen in heterozygous individuals such as the daughter.
E) dominant and is seen in homozygous dominant or heterozygous individuals.