Huntington disease (HD) is a genetic disorder that usually first appears in middle age and, over time, leads to involuntary movements, impaired speech, difficulty swallowing and speaking, and cognitive decline. There is no cure for HD, and affected individuals eventually die, usually after 10 to 15 years of progressively worsening symptoms. Huntington disease is inherited as an autosomal dominant disorder. Presymptomatic genetic testing for HD is available for people with a family history of the disease. Individuals who have a parent with HD have a 50% chance of inheriting the HD gene and eventually having HD. Some of these individuals want to know if they will eventually get the disease, and they undergo presymptomatic genetic testing. Others do not want to know, given that there is no cure or effective treatment for the disease. If you were at risk for HD, would you want to undergo genetic testing? What are some reasons for and against having a genetic test for HD?

Explain the following diagram. It refers to a pedigree on the disease called phenylketonuria. Briefly explain about the disease; specifically biochemical and genetic aspects. Then I interpret the pedigree. Say what type of inheritance the condition exhibits

1. Give an example of genetic traits. Explain 2.Give an example of genetic disorder. Explain

A 22-year-old man enters the clinic with a wide-stepping gait, muscle wasting, myotonia, and bilateral cataracts. His father, who is 55, currently suffers from similar symptoms, which began about 5 years ago. His father's sister also exhibits similar symptoms; hers also began in her 50s. The patient's mother exhibits none of these symptoms. What is the inheritance pattern of this patient's most likely disease?

E. D. A. B. 11. C. Huntington's disease is a degenerative disease of the nervous system that strikes in middle age. The allele that causes the disease (H) is dominant to the allele that results in the normal condition (h). Answer the following questions about the inheritance of this disease. What is the genotype of a man who is normal but whose father had Huntington's disease? What is the genotype of a woman who has Huntington's disease if both of her parents had Huntington's disease? If a man who is heterozygous for Huntington's disease marries a woman who is normal, what would you expect for the genotypes and phenotypes of their children? If a normal man marries a woman who is homozygous for Huntington's disease, what do you expect for the genotypes and phenotypes of their children? Since Huntington's disease is caused by a dominant allele, does this mean it's also the most common allele in the population? F. Since Huntington's disease is caused by a dominant allele, does this mean…

Genetic disorders Complete the following statements to describe several genetic disorders and their symptoms. Choices can be used more than once. The disorder called causes blue-colored skin, sickle-cell disease osteogenesis imperfecta The disorder called that leads to weakened, brittle bones. causes defective collagen methemoglobinemia autosomal dominant The disorder called causes abnormally thick mucus in the bronchial tubes and pancreatic ducts. autosomal recessive The disorder called leads to progressive cystic fibrosis degeneration of neurons in the brain. alkaptonuria The disorder called causes urine to be black. Huntington disease acer %23 24 & 4 8. 9. e y u < 6

Give bilological term for an alternation in the genetic material that can be inherited.

See photo attached.

Give examples of autosomal dominant inheritance.

List the type of heredity (ie autosomal dominant and recessive, X-linked dominant and recessive, epistasis, polygenic, codominant) for color blindness, ABO Blood types, Rh factor, nail patella syndrome, Fragile X syndrome, Kleinfelter syndrome, Turner syndrome, Trisomy 21, CAIS, albinism, PKU.