1.Explain why it would be helpful to know if one is carrying a gene associated with a disease. 2. Briefly describe two methods of prenatal diagnosis and the purpose of each. 3.Explain the meaning of...

1.Explain why it would be helpful to know if one is carrying a gene associated with a disease.

2. Briefly describe two methods of prenatal diagnosis and the purpose of each.

3.Explain the meaning of trisomy 21.

4. How is prenatal diagnosis of Down syndrome achieved?

5.Can diagnostic tests provide full information on the extent of effects of Down syndrome in an individual child at the time of birth?