Vitamin-D resistant rickets is a sex-linked dominant trait which leads to softening of the bones which can cause fractures and deformities. Rickets is often due to a deficiency of vitamin D, however, with vitamin-D resistant rickets, ingestion of vitamin D is ineffective. Maria's mother is normal and does not display any symptoms of this disease; however, Maria's father has the disease. Will Maria have the disease?
A) Yes because this is a dominant disease so only one copy of the bad gene is needed to express the disease.
B) No because 2 copies of the gene are needed for a woman to display symptoms of an X-linked trait.
C) Yes because a daughter always expresses X-linked traits that she inherits from her from her father.
D) No, only male children will exhibit X-linked traits.
E) Yes, because Maria's mother is likely a carrier for the disease.

Question

Quizplus · Accepted Answer

With any dominant disease, only one copy of the gene is required for the trait to be expressed.

Vitamin-D Resistant Rickets Is a Sex-Linked Dominant Trait Which Leads