Genetic counselors are more commonly available for diagnosing some diseases,and for helping in family planning.If a genetic counselor examines a pedigree chart and notices an occurrence of a disease in every generation,she has strong evidence that the disease is caused by

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The occurrence of a disease in every generation of a pedigree chart suggests that it is an autosomal dominant disorder. This means that a single copy of the mutated gene is enough to cause the disease, and it is equally likely to be passed down from either parent to their offspring.

Genetic Counselors Are More Commonly Available for Diagnosing Some Diseases,and