Humans and other species have different genes as per their evolutionary history. But will there be any connection between human to have other species’ genes? Humans indeed share some genes with other species, as it may reflect our common ancestry and evolutionary history. When we look at evolutionary processes such as genetic mutation, genetic recombination, and horizontal gene transfer, they have contributed to the presence of genes from other species in the human genome.
The most well-known example of genes from other species in the human genome comes from our evolutionary ties with other primates. But what are those primates? Generally, primates are a diverse order of mammals; even Humans and chimpanzees share a considerable quantity of genetic material. In an estimate, 98% of human DNA sequence is similar to that of chimps. Therefore, it will indicate a common ancestry and sharing of genetic information over millions of years.
In addition, when we look at horizontal gene transfer (HGT), the transfer of genetic material between different species identified in the human genome. Although, Horizontal gene transfer has happened at different stages in evolutionary history than vertical gene transfer. Some examples of horizontally transferred genes in humans are connected with immunological responses and acquired from other microorganisms such as bacteria.
While humans share genes with other species, the overall genetic makeup of humans is unique and distinct. Hence, specific combinations of genes and the regulation of gene expression contribute to the development and functioning of human traits and characteristics.
When we look at human evolution at a glance, scientists have repeatedly investigated and discovered that genes from other species exist in the human genome and the processes of genetic inheritance and transfer. However, Humans have a distinct collection of genes and features as a species.