Genetic variation, provided through sexual reproduction, offers more opportunity for offspring to survive in changing environments. What two aspects of meiosis provide sources of such variation?A. Mutation and fertilizationB. Crossing over and allelic exclusionC. Segregation and independent assortmentD. Crossing over and independent assortment of chromosomes
Crossing over is an important characteristic of meiosis which provides the genetic variation and various allelic combinations present in the offspring. Hence the answer is option D.
