Question 4

(Multiple Choice)

Most pedigrees showing the hypothetical human trait show the following characteristics:
• Females are affected twice as frequently as males.
• Affected fathers may have affected daughters but never affected sons.
• Half the children of affected mothers and normal fathers are affected.
What is the MOST likely mode of inheritance for this disorder?


A) autosomal recessive
B) autosomal dominant
C) X-linked recessive
D) X-linked dominant
E) Y-linked

Answer