How Does Meiosis Lead to Genetic Variability?

Meiosis leads to genetic variability through genetic recombination, sometimes called crossing over, in prophase I and the chromosome arrangement in the metaphase I. Genetic variability is important for species because it allows them to adapt to more environments.

Genetic variability refers to the ways that genotypes differ from one another. Without genetic variability, a species will find itself more susceptible to disasters and diseases. Species that lack genetic variability are often inbred.

Meiosis is a process that creates gametes, which are egg cells and sperm cells, according to Miami University. When meiosis is performed, the maternal and paternal genes are exchanged and copied to create new gene combinations. Each of the gametes that are created will have 23 new chromosomes, which are unique to the new being.

Meiosis is divided into two parts: meiosis I and meiosis II. All of the genetic variability steps occur in meiosis I. Meiosis I follows these steps: interphase I, early prophase I, late prophase I, recombination, metaphase I, anaphase I and telophase I. Meiosis II follows these steps: interphase, prophase II, metaphase II, anaphase II and telophase II. Before either of these meiosis processes can be started, the DNA has to replicate. Then the process of meiosis I and meiosis II begins.