Identify the process that is necessary for sexual reproduction, explain why it is necessary, and identify how this process increases genetic variation.
@PsyDAG
Could you stop replying to everyone with that SAME QUESTION with that SAME ANSWER? It's annoying, sir. If they wanted to Google it, they would have🤦♀️
The process that is necessary for sexual reproduction is called meiosis. Meiosis is a type of cell division that occurs in reproductive cells, such as sperm and eggs, to produce gametes with half the number of chromosomes found in other body cells.
Meiosis is necessary for sexual reproduction because it ensures the stability of the species' chromosome number from generation to generation. Let me explain why:
1. Chromosome Reduction: Meiosis involves two consecutive rounds of cell division (meiosis I and meiosis II) that result in the production of four haploid cells (gametes) from a single diploid cell. During meiosis I, homologous pairs of chromosomes align and exchange genetic material through a process called genetic recombination or crossing over. This recombination shuffles genetic material, leading to new combinations of genes in the resulting gametes.
2. Genetic Variation: Meiosis increases genetic variation by creating new combinations of genes through the process of recombination. When homologous chromosomes undergo genetic recombination, sections of DNA can swap between the chromosomes. This creates unique combinations of genetic information in the gametes, which are then passed on to offspring during fertilization. Additionally, the random assortment of chromosomes during meiosis ensures that each gamete receives a unique combination of maternal and paternal chromosomes, further increasing genetic variation.
By promoting genetic variation, meiosis plays a critical role in evolution. It introduces new genetic combinations into populations, allowing for adaptation to changing environments and enhancing the survival and reproductive success of individuals.
I searched Google under the key words "Meiosis" to get these possible sources:
https://www.google.com/search?client=safari&rls=en&q=meiosis&ie=UTF-8&oe=UTF-8&gws_rd=ssl
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.