Definition of Gene Family
Gene family is defined as two or more than two different genes that are homologous to each other and are found in the single species. It is thought that these homologous genes are derived from the same ancestral gene. These genes are similar to one another as they are formed by the process of duplication of the single gene that was original.
These genes perform biochemical functions that are alike. The families of genes have been made on the basis of the sequences of nucleotides and proteins they share with each other. The example of gene family includes the genes haemoglobin subunits of humans.