This is the only book on the list that I decided to stop listening to before the end. (I got 3 hours in to the total 12 hours.) I found it a bit too slow and content-light, and given this found it hard to concentrate enough to internalise the content there was. This may be a case of me not being able to learn science through audiobook format, but I will probably try one more scientific book before taking this conclusion too seriously.
I would recommend saving time and money, and instead of buying this book simply read the Wikipedia page on genetics, and watch this video about DNA replication [link]. I am fortunate in that one of my friends knows everything about genetics/medicine/science, so she kindly sat down for half an hour with me and explained all the basics. The benefit of this approach is that you can ask questions. (Thanks Emily!)