D. One sex has a higher chance to inherit it than the other (male).
These can be either recessive or dominant. We usually think more of the recessive traits like color blindness and hemophilia but dominant sex-linked traits also exist (fragile X).
Polymerase chain reaction to amplify the DNA would be the technique used in the blood lab.
Answer:
my I'd is - Itz Unique Girl
but why do you want it??