Your 78-year-old grandmother is having difficulty with memories of her grandchildren, whom she dearly loves. she has difficulty with simple tasks that she has performed hundreds of times, such as remembering the route to the grocery store. she is also quite a bit different in her personality than she used to be. what is your grandmother most likely experiencing?

Awoman comes to your genetic counseling center because she knows that huntington disease occurs in members of her family. her paternal grandfather was afflicted, but so far her father shows no symptoms. her two great-great grandmothers on her father's side were healthy well into their 90s, and one of her great-great grandfathers died of unknown causes at 45. testing for huntington disease is extremely expensive, but she is concerned that she may fall victim to this disease and wants to plan her life accordingly. after examining her pedigree you advise her to