Question

review describe how new genes are created through duplication and rearrangement.

Explanation:

Gene duplication occurs when a segment of DNA containing a gene is copied. This can happen through unequal crossing - over during meiosis or errors in DNA replication. Once duplicated, the extra copy is free to accumulate mutations. These mutations can lead to changes in the function of the gene product or the regulation of the gene. Rearrangement can involve the movement of gene segments within the genome. Transposons or other mobile genetic elements can move genes to new locations. Over time, these processes can result in the creation of new genes with novel functions.

Answer:

Gene duplication creates extra gene copies which can accumulate mutations. Rearrangement moves gene segments. These processes can give rise to new genes with new functions.