14.4

Which of the following would result in a frameshift mutation?

• Insertions only

• Substitution only

• Deletion only

• Insertions and Deletions

What mutation has occurred here?

T-G-A-C-C-A

T-G-A-G-C-A

• Substitution

• Deletion

• Insertion

• Frameshift

A mutation is defined as:

• A change in the cell's structure

• Anything that changes in an embryo

• Any change in the physical features of a human

• A change in the DNA sequence

Why are insertion and deletion (frameshift) mutations so harmful?

• They change all of the codons from the mutation on down the line, which changes the amino acid sequence

• They insert things that an organism doesn't need.

• They often delete things that organisms need.

• Insertion and deletions are not any more harmful than substitution mutations.

Genetic mutations can be...

• beneficial, harmful, or neutral

• beneficial only

• harmful only

• neutral only

A change in a single nucleotide in a gene sequence is called a...

• Point Mutation
• Single Error
• Mono Mutation
• Isolated Mutation

A rabbit that has short deformed legs and cannot jump or run fast would have a____

• Harmful mutation
• Beneficial mutation
• Neutral mutation
• normal life

A desert animal with extra thick fur/hair would be___

• Harmful
• Neutral
• Beneficial
• Happy

Chemical or physical agents in the environment that may cause mutations are called:

• mutants

• mutagens

• chromosomal mutations

• missense mutations

Mutations that change the amino acid specified by the codon, affecting the amino acid sequence, are called:

• nonsense mutations

• missense mutations

• silent mutations

• all of the above