This post is a follow-up to Chana McCarthy’s keen insights in her guest post.  Allegiant was not the book I expected; and I must admit it is not love at first sight. But, having read the bombshell ending yesterday, and with a little recovery time I am liking it more and more. I am eager to go back for a re-read, so I can’t hate it too much.  I’ll come back with a post about what I did like later.

Right.

But, like Chana, I was most disappointed in the science of it, particularly when the psychology and neuroscience were so well handled in Divergent and Insurgent. The “genetic engineering study gone bad” is simply not believable on any level, even from the basic test they do in the lab. Helllooooo? If you need to do a genetic test on someone, it is far easier to take a cotton swab and scrape out some cheek cells than it is to inject your subject with some sort of micro-computer-packed serum.

Wrong.

I’m quite sure that the technology of basic cheek cell harvesting, of the type practiced in 9th grade biology classes all over, is not going to be lost over the next 300 years, no matter how many Purity Wars we have. The compound scientists may be reasonably well off financially, but there is no need for them to waste resources on a complicated serum when a Q-tip will do.

Second, if you have the technology to go in and “knock out” certain genes (for cowardice, low intelligence or whatever) it stands to reason that you would have the technology to reinsert the original sequences. It’s done with mice all the time. A basic understanding of DNA replication should make it clear that there is no reasonable mechanism for “healing” genes over time… the only way to “heal” a mutation is to rewrite the DNA sequence to get the original gene back: not something to be done one step at a time, over generations.  In fact, assuming the “experiments” started out with a population of diverse broken genes (some intelligence, some courage, etc) the last thing you want to do is isolate them and let them interbreed with each other for generations.  You are just as likely to wind up with people carrying multiple mutations that they inherited from different parents as you are to see people “healed.”  There is only one good reason for isolating genetic undesirables together: to make it easier to exterminate them all.

Interestingly, there is one hot new area of science that could have been used to make a bit more sense out of this storyline: epigenetics. Which is, in a nutshell, modifying not the DNA itself, but how it is packaged, to make certain genes more or less expressed or silenced entirely. [Read more…]