Metagenomics is a branch of genetics that deals with the study of collecting genetic material from different organisms present in a community. Generally, the microbial communities are being studied in metagenomics. Environmental genetics, Eco-genomics, and community genomics are the broader fields that refer to metagenomics. When we study microbial communities and are unable to separate the two microbes from each other, then metagenomics is applied there.
Consider an example of two bacteria that are growing together, so when you take the genome of one bacterium, it is actually the genome of both. Hence, a single organism is not taken into account but the whole community. It helps us in order to make advances in researches in medicine, ecology, agriculture, environmental sustainability etc.
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