Question

Name the main sources of genetic variation. How do these sources work?

Answer 1

The main sources of genetic variation are mutation, genetic recombination, and random fertilization. Mutation introduces new genetic information by altering DNA sequences, creating new alleles. Genetic recombination occurs during sexual reproduction through independent assortment of chromosomes and crossing over in meiosis, resulting in new gene combinations. Random fertilization further enhances variation by the unpredictable union of gametes. These processes shuffle and introduce genetic differences, providing raw material for evolution and diversity in populations.