A) unaffected offspring
B) sex unspecified
C) normal mating
D) consanguineous marriage.
Correct Answer: D
Solution :
: Double lines in pedigree analysis represent mating between relatives, i.e., consanguineous mating. Normal mating is shown by single line. Symbol
represents sex unspecified. Unaffected offspring are depicted by open and clear symbols (i.e., 
for male and 
tor female).
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