Question

3 multiple choice 1 point frameshift mutations occur when a single nucleotide change causes a major error in the protein. one or more nucleotides are inserted or deleted, changing the reading frame. a chromosome segment flips orientation, causing it to be transcribed backward. one nucleotide is replaced by another and the final protein doesnt change. 4 multiple choice 1 point what type of mutation is shown here? original gene sequence: atg - ccg - tta - gga mutated gene sequence: atg - cca - tta - gga a point mutation a nonsense mutation an insertion mutation a deletion mutation

Explanation:

1. Frameshift mutations occur due to insertion or deletion of nucleotides that shift the reading - frame of the genetic code. For the first question, this is the defining characteristic of frameshift mutations.
2. For the second question, a point mutation is a change in a single nucleotide. Here, only one nucleotide in the second codon (from CCG to CCA) has changed.

Answer:

1. one or more nucleotides are inserted or deleted, changing the reading frame.
2. A point mutation