. What sex is the person who has the karyotype described in Step 2? How do you know?

2. In what ways are the mutations described in Steps 3 and 4 different from those described in
Steps 5 and 6?

3. In Step 6, you saw that cystic fibrosis is caused when specific sections of both copies of chromosome 7 are deleted. On the basis of this information, do you think cystic fibrosis is a dominant or recessive trait?

4. Do all mutations result in negative effects?