Final answer:
Large blocks of the genome that are present at two or more locations are known as duplications. They occur when a segment of DNA is repeated, resulting in multiple copies of genes in the chromosome. An example of a large-scale duplication is the duplication of the Hox gene clusters in vertebrates.
Step-by-step explanation:
Large blocks of the genome that are present at two or more locations are known as duplications.
Duplications occur when a segment of DNA is repeated, resulting in multiple copies of genes in the chromosome. These duplications can have significant effects on the organism's phenotype and can play a role in evolutionary processes.
An example of a large-scale duplication is the duplication of the Hox gene clusters in vertebrates, which is believed to have played a crucial role in the diversification of body plans during evolution.