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Beyond Genotype

Could Their Be an Even Deeper Classification System in Biology Yet to be Discovered?

By Everyday JunglistPublished 3 years ago 3 min read
Pretty. Image by Krzysztof Niewolny from Pixabay. Pixabay, like ebay but for Pixie’s.

If you know nothing at all about classification systems in biology or have forgotten what little bit you once knew I suggest you read this first before proceeding.

When it comes to the identification and classification of microorganisms it seems we have reached an endpoint with the genotype. The completely described genetic sequence of an individual microbe is its exact identity and any other microbe with the same sequence is the same microbe, they are identical. They are in fact true clones. For organisms that divide by binary fission like bacteria this seems a reasonable conclusion and their would seem no need to look for (and there may not exist) a deeper system. However, one needs to be clear that genetically identical bacteria are not necessarily (and almost certainly are not) identical at all other levels because of the influence of environmental factors on gene expression. So even two bacterial clones that are in fact the same bacteria can also be different bacteria depending on a host of variables and of course depending on where one chooses to look.

When me move to “higher” level organisms though the picture becomes much murkier. Are two bear that have the exact same genetic sequence (if it were possible) the same bear? Your first instinct is to say of course not, they are two uniquely existing individual bear, so how could they be the same. And yet, if they have the exact same genomes, down to the very last base pair, that would mean they would (have the ability to) express the exact same proteins, have exactly identical organs and every other system of their bodies would be identical. Here is where the complicating factor of the environment comes into play. For, even two genetically identical individuals will not be exactly identical because there are environmental factors (most not well understood) that can and do influence gene expression. The bears may in fact be different in many ways or they may not. Incidentally the same is true of human “identical” twins. In either case having the complete genome sequence of the bear still provides an identity to the bear just have having the complete genome of the bacteria provides and identity to it. From this perspective bears and bacteria and humans are really not that different. A whole genome sequence of each individual would seem to be the deepest level of classification we can reach. Of course there are many options “higher” up the chain for classification such as proteotype and metabolotype and others, but since these are ultimately all directly determined by the the genotype they do not provide much ground for a more meaningful system of identity characterization.

So what might be possible “below” the genotype? What could possibly be deeper than that. One possibility arises from outside of biology in the realm of quantum physics. Could there be such a thing as a quantotype? A description of a living being based on quantum principles. A description which takes into account the probabilistic nature of molecular interactions at the quantum level. By its very nature a quantotype would be a fuzzy picture of a thing. As I have written about before it is dangerous applying quantum principles to things which exist at the macro level as people and animals and even microorganisms do. It is all too easy to read quantum effects into things which look analogous to quantum principles but because they happen at the macro scale are not truly effected by said principles. Or at least, that is the traditional thinking about such things. But still…..

Science

About the Creator

Everyday Junglist

About me. You know how everyone says to be a successful writer you should focus in one or two areas. I continue to prove them correct.

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