For those who don't have much time to spare, there is one simple shortcut which will help one start to understand the relative magnitudes & speeds of recombination vs. mutation.

Look at a large family. Note the differences between siblings. Far less than one per cent of these differences are due to mutation. The differences you see (a.k.a. variety) are overwhelmingly the result of recombination.

May not sound like a big deal, but it's more than enough to shut down any version of evolutionism I've ever encountered. The environment is supposed to 'favour' this or that, say tallness for example. Will tallness show up as a result of recombination? You bet! And quickly. Will it show up as a result of mutation? It could. How many generations are you prepared to wait? How many is the environment going to wait?

It's not hard at all to see that even if one imagines beneficial mutations, they can't get any traction, and the race is over before they even reach the starting gate.

Now factor in gene expression: the capacity for coded information to lie dormant for centuries just waiting until it's needed. Then "whoop there it is!" How can mutation compete with that? No way! Lifeforms adapt to their environments by design. These are all things which have been observed, and they handily eliminate the need for & possibility of unobserved mythological conceptions.

Note also that in purebred animals, there is much less variety. Much of the information has been bred out of these creatures, which is why they all look alike and tend to be vulnerable to the same diseases. Inbreeding also diminishes genetic information.

It's not hard at all to see why evolutionists view(ed) genetics as the antithesis of Darwinism. It's a xor deal, unless you can buy Hegel's nonsense, and that obviously takes effort and intent to deceive oneself.

Edit:
One should be aware when reading the hype, that most of the time, the results of recombination and gene expression are reported as "mutations". If you have time, look into some of these for yourself & be prepared to laugh. You'll even see cases where highly "educated" biologists get it totally wrong - which just shows the extent to which the truth of recombination is kept out of their college courses. You will see it, and you will know it; it doesn't take all that much education - just factual, accurate, simple knowledge.