A single nucleotide is deleted from a gene. What is the likely result?
Answer and explanation
Correct answer: D. A frameshift that alters every codon after the deletion
- Step 1: Deleting one nucleotide shifts the reading frame.
Answer
A frameshift that alters every codon after the deletion.
Why not the others: Only substitutions can cause a single amino acid change.
Practise more Cell Division, Genetics and Molecular Biology.
Free questions with an explanation for every one, and full timed Alberta Diploma Exams mock tests.
More Cell Division, Genetics and Molecular Biology questions
- What is the function of a restriction enzyme?
- Which type of mutation changes a codon so that it becomes a stop codon?
- Which molecule carries amino acids to the ribosome during translation?
- A heterozygous tall plant is crossed with a short plant. What is the expected ratio of tall to short?
- A colour-blind man (X^c Y) and a carrier woman (X^C X^c) have a child. What is the probability that a daughter is colour-blind?
- What does a pedigree with a trait appearing in every generation, passed from an affected parent to about half the children, suggest?