If DNA based technologies become widely used, how might they change the way evolution proceeds, as compared?

Question

with the natural evolutionary mechanisms of the past 4 billion years?

Answer 1

In theory, it could speed things up tremendously. DNA based technologies could allow us to change our genes, or even add new genes from other species at will. Normally we have to wait for a random mutation to occur followed by generations and generations of random breeding and selection. Long process. With DNA based technologies directed mutations can be made and selected for instantly. Very fast.

In reality, it won't even make a dent. Because the process will always be very expensive and limited to a small proportion of the human population. In addition, those people without access to DNA based technologies breed just as efficiently as those who do have access. Often faster. Without an advantage in reproductive success no mutation affects human evolution, directed or not.

I'm guessing you or whoever asked the question only wants to hear the first part though.

Answer 2

Well, with genetics we would manipulate certain organisms, so we could choose which genes would be represented in the next generation in a disproportionate number as would be if genes were chosen by natural selection.

Also, with genetic engineering, it would be possible to take present genes & manipulate them, either silencing them or activating them, these could cause the genes to change & to now have a different future.

Certain genes may now become 'extinct'. This could cause huge changes & could accelerate evolution in some aspects. It would almost be like deliberate mass mutations.