Answer :
One source of genetic variation in meiosis is Recombination or crossing over.
A zygote is formed when one gamete from each parent combines fertilization. In meiosis, each gamete has a unique set of DNA because of recombination and independent selection. The resulting zygote is a one-of-a-kind creation as a result of recombination.
In prophase I, homologous chromosomes, one from each parent, pair along their lengths, gene by gene, resulting in recombination or crossing over. Chromosomes break and then rejoin, exchanging some of their genes. The combination of genes on the chromosomes is now novel.
During meiosis, the process of chromosomes moving at random to separate poles is called an independent assortment. After meiosis, a gamete will have 23 chromosomes, but independent assortment means that each gamete will have one of many different chromosome combinations.
This rearranging of genes into one-of-a-kind combinations raises a population's genetic variation and explains the variation between siblings with the same parents.
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