Because there was no previous history of hemophilia in Queen Victoria's family,and because she transmitted the mutant allele to a number of her children,it is reasonable to assume that ____.
A) her father was homozygous for the disorder
B) her mother was homozygous for the disorder
C) her sister was a heterozygous carrier
D) she was homozygous for the disorder
E) she was a heterozygous carrier

Question

Quizplus · Accepted Answer

Queen Victoria was a carrier of the mutant allele for hemophilia, meaning she only had one copy of the allele and did not express the disorder herself. This is supported by the fact that there was no previous history of hemophilia in her family and that she transmitted the allele to some but not all of her children. It is unlikely that her father or mother were homozygous for the disorder, as this would have been noticeable within their families, and her sister being a heterozygous carrier is possible but not necessary to explain the inheritance pattern seen in Queen Victoria's descendants.

Because There Was No Previous History of Hemophilia in Queen