Charcot-Marie-Tooth (CMT) is an inherited disease that results in the gradual loss of function and sensation in the hands, arms, legs and feet. Over 100 different gene mutations have been identified that cause CMT. The pedigree diagram shows the inheritance of one form of CMT in part of a family. The allele for CMT can be represented by the letter c in this recessive pattern of inheritance. What is the probability that a fourth child would be a female with CMT? (1)

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