Mitosis Vs Meiosis

The origins of genetic variations come from changes in DNA sequences called mutations. Mutations can be caused by environmental factors such as radiation, chemicals, or viral infections; mistakes during DNA replication; or random errors in cellular processes such as recombination or crossing over during meiosis. These mutations can result in differences in appearance, behavior, and physiology between individuals within a species (National Institute of General Medical Sciences 2020). Thus, they can contribute to the diversity needed to drive evolution through natural selection. Meiotic recombination is one form of mutation that shuffles gene combinations passed on from generation to generation providing new possibilities for different traits within species (Keightley & Otto 2006). Therefore understanding how meiosis works is crucial for understanding how populations adapt to their environment over time. References: Keightley P., & Otto S.. 2006,. Genetic variation maintained by balancing selection in humans: an evolutionary perspective 1st edn., Oxford University Press Incorporated New York USA p 394–399 . National Institute of General Medical Sciences .2020,. What Are Mutations? Retrieved March 10th 2021 from https://www.nigms.nih.gov/education/pages/factsheet_DNAreplication