In theory each generation would be an exact copy of its "parent" but mistakes can and do happen in the copying process so there can be slight differences in the next generation. Thats how the virus evolves. If these random errors in the copy end up making the new virus more successful there will me more of the variant
supamee t1_izoput8 wrote
Reply to comment by Galaxy-Hitchhiker42 in How did viral DNA become part of the human genome? by emelrad12
In theory each generation would be an exact copy of its "parent" but mistakes can and do happen in the copying process so there can be slight differences in the next generation. Thats how the virus evolves. If these random errors in the copy end up making the new virus more successful there will me more of the variant