Emma's grandmother, who is Jack's great-aunt, suffers from , a neurodegenerative disorder caused by an autosomal dominant mutation in the HTT gene (Chapter 4, p. 134, Hartwell et al., 6th edition). This means that a single copy of the mutated gene is enough to cause the disease. Emma's grandmother inherited the mutated gene from her mother, and there's a 50% chance that Emma inherited it too.
Emma and Jack decide to undergo genetic testing to determine their risk of developing these conditions. They meet with a genetic counselor to discuss their family history and test results. genetics from genes to genomes hartwell 6th edition pdf
The story of Emma and Jack illustrates the importance of genetics and genomics in medicine. By understanding the genetic basis of disease, healthcare providers can offer targeted testing, counseling, and treatment. Emma's grandmother, who is Jack's great-aunt, suffers from
Meet Emma and her first cousin, Jack. Emma's mom and Jack's mom are sisters, making them first cousins. Both Emma and Jack are healthy, but their family has a history of certain genetic disorders. Emma's grandmother inherited the mutated gene from her
The HTT gene mutation in Emma's family is an example of a , caused by a single gene mutation (Chapter 4, Hartwell et al., 6th edition). In contrast, breast cancer is a complex disease , influenced by multiple genetic and environmental factors (Chapter 16, Hartwell et al., 6th edition).