Q. Double lines in pedigree analysis show

 2700  199 KCETKCET 2015Principles of Inheritance and Variation Report Error

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 O for female).