Question

1. Testing requirements for genetic diseases is not standard across all diseases because

   	A.	All of these choices illustrate why testing for genetic diseases is not standardized; different diseases may be more or less easy to test for, and some have greater societal costs for expression and so are more likely to be tested for.
   	B.	Some diseases, like OCA, are evident at birth.
   	C.	For individuals at risk for Huntington's Disease, people may not want to know that they have the disease.
   	D.	For certain diseases like PKU, testing can allow parents to completely avoid the phenotype of the disease

Answer 1

Answer: A

Some genetic diseases can be detected at the time of conception, some can be detected in the zygotic stages immediately after conception, and some in the later stages of the lifespan. Genetic tests vary for different types of disorders. For example, in new-born screening, we can detect diseases like phenylketonuria (PKU), sickle cell anaemia. In prenatal diagnosis, we can detect neural tube defects. The availability of different standard test requirements for genetic diseases provides an opportunity for both doctor and a patient to work towards the prevention of diseases.