Why are mutations important for evolution?
Answer and explanation
Correct answer: D. They are the original source of new alleles and of genetic variation
- Step 1: A mutation is a change in the DNA sequence. Step 2. It creates new alleles on which selection can act. Answer: they create new alleles. Why not the others: many mutations are neutral or harmful, they occur in any environment, and they add variation.
Practise more Génétique, évolution et immunité.
Free questions with an explanation for every one, and full timed French Baccalaureat mock tests.
More Génétique, évolution et immunité questions
- In a DNA double helix, which base pairs with adenine (A)?
- How many cells result from meiosis of one diploid cell, and what is their chromosome number compared with the parent cell?
- What is produced during transcription, and where does it happen in a human cell?
- Where does translation take place, and what does it produce?
- What is a codon?
- What is an allele?