AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

GENE MUTATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Original DNA segment:TTACGCAAG
A
Substitution
B
Insertion
C
Inversion
D
Translocation
Explanation: 

Detailed explanation-1: -Expert-Verified Answer. This is because, in the mutated DNA segment, the third base Adenine(A) is missing which was present in the original DNA segment. Thus, the mutated DNA segment is an example of deletion.

Detailed explanation-2: -Answer: This is an example of a deletion mutation.

Detailed explanation-3: -frameshift mutation because the change introduces an extra T near the beginning of the sequence. This will change the frame of the codons of the gene. The starting sequence of a gene changed from AUGTTCGACGTG to AUGTTTCGACGTG.

Detailed explanation-4: -A point mutation occurs in a genome when a single base pair is added, deleted or changed.

Detailed explanation-5: -Substitution mutations can be good, bad, or have no effect. They cause three specific types of point mutation: silent, missense, and nonsense mutations. A silent mutation is one where the function of the protein is not changed. A missense mutation codes for the wrong protein.

There is 1 question to complete.