Explain the relationship between crossing over and genetic variation.

In meiosis in prophase I is that the homologous chromosomes of maternal and paternal origin, pair up originating, this process is called "synapse" and they form what is known as a tetrad or bivalent chromosome.

In these tetrads, junctions called chiasms are formed, areas in which both homologues exchange genetic material or genes, a process called crossing-over.

Genetic variation is a measure of the tendency of genotypes in a population to differentiate.

Meiosis ensures genetic variation, since the process of recombination of genetic content allows the originated descendants to retain a large part of the characteristics of their ancestors.

One of the mechanisms that allow this genetic variation is the crossing over in prophase I, where the exchange of genetic information occurs between the chromatids of the homologous chromosomes.

Crossing-over opens the possibility of new adaptations and relationships with the biological environment.

Therefore, we can conclude that the relationship between crossing over and genetic variation is the crossing over allows originated descendants to retain much of the characteristics of their ancestors.

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