Gene Mutation & Gene Flow MCQ - Practice Questions with Answers

Gene Mutation:

• It is the population that evolves and not its individual members. The role of an individual is to pass its genetic variation to its offspring.
• Mutations are sudden and heritable changes. 
• Changes in gene structure and expression due to addition, deletion, substitution or inversion of nucleotides are called gene mutations.
• The frequency of gene mutations increases in the presence of mutagens.
• Gene pool is the sum total of all the different genes and their alleles present in a population.
• Gene pool evolves new genes and brings about variations in the population.

Gene Flow:

• The movement of individuals from one place to another is called migration.
• If the migrated individuals breed within the new population, the immigrants will add new alleles to the local gene pool of the host population.
• This is called gene flow or gene migration.