Mutation and Genetic Variation — NEET Biology
📚 Practice ConceptMutation is a phenomenon which results in alteration of DNA sequences and consequently results in changes in the genotype and the phenotype of an organism. In addition to recombination, mutation is another phenomenon that leads to variation in DNA.
Which of the following statements about mutation and mutagens are correct? S1: Mutation is a phenomenon which results in alteration of DNA sequences, leading to variation. S2: Deletions and insertions of base pairs of DNA can cause frame-shift mutations. S3: Chemical factors are the only agents that can induce mutations in organisms. S4: A point mutation is a change in a single base pair of DNA, as seen in sickle cell anemia. S5: X-rays are considered a type of physical mutagen.
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