Day 7_Semes 1_TEK 6E/6D_BR

A random change in DNA sequence is called

• transgenic shifT

• Single Genotype

• Monohybrid Trait

• Mutation

Genetic mutations can be

• beneficial , harmful, or neutral

• beneficial only

• neutral only

• harmful only

Mutations are a source of genetic variation

• True

• False

Original DNA: TTACGCAAG

Mutated DNA: TTACGCAAC

What mutation occurred?

• Substitution

• Inversion

• Inversion

• Insertion

• Translocation

Original DNA : TTA-CGC-AAG

The mutated DNA: TTC-GCA-AG

What mutation occurred?

• Substitution

• Deletion

• Insertion

• Inversion

Original: ATC CAT

Mutation: ATC GCAT

What mutaion occurred?

• Deletion

• Insertion

• Silent

• Transverse

Which of the following would result in a frameshift mutaion?

• Insertions only

• Substitution only

• Deletion only

• Insertions and Deletions

Mutated DNA sequence that can be passed from parent to offspring-

• occur in somatic cells (body cells)

• are rejected by meiosis

• occur in gametic cells (sex cells)

• only occur if the parent is exposed to harmful substances

Why are insertion and deletion 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 deletion are not any more harmful than substitution mutations.

A mutation in which only one nucleotide is altered is called a:

• Frameshift Mutation

• Deletion Mutation

• Point Mutation

• Insertion Mutation