Unit 10 Gene Regulation

The arctic fox inhabits northern areas of North America. The same arctic fox is shown in the drawing at different times of the year. What causes this change in fur color?

• The alleles for fur color changes as the arctic fox grow older.

• Gene expression for fur color is regulated by latitude.

• The arctic fox has two traits for fur color that are determined at birth.

• Gene expression for fur color is regulated by temperature.

Which type of mutation is MOST LIKELY to cause the greatest disruption?

• Frameshift Mutation

• Point Mutation

• Substitution Mutation

• Silent Mutation

A frameshift mutation where a nucleotide base

is removed from the DNA sequence.

• Deletion Mutation

• Insertion Mutation

• Translocation Mutation

• Substitution Mutation

What type of mutation causes a premature stop codon to appear in the amino acid sequence?

• Deletion Mutation

• Nonsense Mutation

• Missense Mutation

• Silent Mutation

Base pair rule for RNA is

• T = U

  G = C

• A = U

  G = C

• T = G

  A = C

• A = U

  C = T

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

• Substitution

• Deletion

• Insertion

• Silent

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

• Substitution
• Deletion
• Insertion
• Frameshift 

Which of the following polypeptides is coded for by the following

mRNA sequence:

AUG GUU AAA CGA CAA UCC

• Val, Lys, Phe, Gly, Ser

• Met Asp, Phe, Ala, Arg

• Met, Val, Lys, Arg, Gln, Ser

• Ile, Gln, Lys, Asp, Gln, Ser

A substitution mutation that has no effect

on amino acids sequence

• Missense Mutation

• Silent Mutation

• Nonsense Mutation

• Insertion Mutation

One nucleotide base is changed so only one amino acid

is affected

• Frameshift Mutation

• Point Mutation

• Nonsense Mutation

• Silent Mutation