Question

Choose the correct answers from the alternatives given :
Which statement best explains the evolutionary advantage of meiosis?

• A. Meiosis is absolutely necessary for sexual reproduction
• B. Meiosis alternates with mitosis from generation to generation
• C. Genetic recombinations are possible
• D. The same genetic system is passed from one generation to another

Answer 1

The correct option is C Genetic recombinations are possible

• Meiosis is the reduction division where the cell after dividing produces 4 daughter cells each having half the genetic material compared to the mother cell.
• This kind of division takes place in the formation of the gametes which are required for reproduction.
• The gametes are haploid as in sexual reproduction 2 type of gametes are required where both are haploid and when they fuse they form a diploid zygote.
• Sexual reproduction is important from the evolutionary point of view as the during the formation of the zygote the gametes from both the parents are fused and the zygote will acquire the characteristics of both the parents .
• Thus the offspring will have characters from both the parents as well new characters may be formed because of both the genetic material coming together.
  
• Also during meiosis 1 in the prophase the chromosomes go under the process of crossing over where the genetic material between the non sister chromatids is exchanged this provides for the chances of genetic recombination thus forming variation in the genetic material.
• Therefore the answer option 'Genetic recombinations are possible' is correct.