1. A DNA segment has base order AGC TTA TCG. Which copy exhibits a frameshift mutation through deletion?(1 point) -AGC TCG
-AGC TTA TAG
-TTA TCG
-AGC TTT CG

2. A DNA segment has base order CCC ATA GCT. Which copy exhibits a deletion in the first codon triplet and then a substitution mutation?(1 point)
-CCA ATA GCT
-CCC TAG CT
-CCA YAA CT
-CCA TAG CT

3. Which type of mutation causes cystic fibrosis?(1 point)
-insertion
-deletion
-substitution
-silent

4. Which statement about chromosomes is true?(1 point)
-DNA contains chromosomes.
-The same number of chromosomes appears in haploid and body cells.
-Chromosomes contain DNA.
-Chromosomes are found in sets of three.

5. Which modification affects an organism’s expressed characteristics while leaving its DNA sequence unchanged?(1 point)
-insertion mutation
-substitution mutation
-deletion mutation
-epigenetic change