Which of the following statements about genes responsible for X-linked disease inheritance is/are TRUE?
Which of the following statements about genes responsible for X-linked disease inheritance is/are TRUE?
1: They are located on the X chromosome.
2: They are passed on from mother to female child only.
3: They are passed to all male offsprings from male parent.
4: They are passed to all male offsprings from affected mother.
A. only 1
B. only 1 and 4
C. only 2, 3 and 4
D. only 1, 2 and 3
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