Shelt Mutations

What is a mutation?

• A change in a chromosomal region.

• A negative change in the nucleotide sequence of DNA.

• A change in one base pair in DNA.

• Any change in the nucleotide sequence of DNA.

What type of chromosomal mutation loses genes?

• Duplication

• Inversion

• Deletion

• Translocation

What type of chromosomal mutation gains a copy of the same genes it already has?

• Duplication

• Inversion

• Deletion

• Translocation

What type of chromosomal mutation gains extra genes that it did not have before?

• Duplication

• Inversion

• Deletion

• Translocation

What type of gene mutation has occurred here? Normal-

AGA-TTC-ATA-GCG

Mutant-

AGA-TTC-AAT-AGC-G

• Deletion (causing a frameshift)

• Insertion (causing a frameshift)

• Substitution

• Nonsense

What is the correct mRNA strand from this DNA?
CAC-GTG-ACA-GCG

• GTG-CAC-TGT-CGC
• CAC-GUG-ACA-GCG
• GUG-CAC-UGU-CGC

What mutation has occurred here? 
T-G-A-C-C-A
T-G-A-G-C-A

• Substitution
• Deletion
• Insertion
• Frameshift 

DNA molecule segment is : TTACGCAAG
The mutated DNA segment is TTCGCAAG. This is an example of ___ mutation.

• Substitution
• Deletion
• Insertion
• Inversion

Where do mutations occur?

• DNA and RNA
• DNA 
• RNA
• mRNA and tRNA

In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of

• cytosine
• guanine
• thymine
• uracil