EXERCISE Fill in the blank.
1. A genetic mutation causes a disease when the the DNA encodes is altered such that it no
longer functions properly.
2. Errors during can cause genetic problems with the resulting germ cells.
3. Down syndrome is caused by three copies of chromosome 21, also known as 21.
4. A silent mutation is a change in the DNA that does not change the encoded and has no
phenotypic effect.
Respond to the following based on your reading.
5. Why is it difficult to diagnose genetic conditions?
6. Explain how Down syndrome, also called Trisomy 21, occurs.
7. Discuss why a silent mutation does not affect the function of a genetic sequence.
Enter your response hare