Oooookayyy ....
I wanted to post the following for quite a while now. This thread is as good as a new one, I guess.
It’s about fur color, fur pattern and genetics - and how one of them is related and the other (somehow) isn’t.
Right from the beginning, I loved the idea that the animals’ genetics influences their behavior and appearance. Size, fertility, disease resistance ... fantastic! And I would really love, love, love, if parents would also pass their (newly to be introduced) fur colors to their offspring! Fur color variations; how awesome would be this? I am all for it!
However!
However, fur patterns are not part of genetic inheritance!
Well ... of course: A zebra having stripes is obviously encoded in its genome. Whether the stripes are thicker or thinner or how many and where a zebra will have stripes is actually a criterion that defines different zebra species (like the plains zebra vs. grevy zebra).
The pattern’s exact realization, however, is handled differently! How the stripes might fork, how long certain stripes are, where exactly they are placed (in the spectrum of their usual distribution) - all this is not genetically encoded!
These individual characteristics are not located on genes, but are an effect of biochemical mechanisms during the ontogenesis (the development phase of the fetus). It’s almost a random process (well, random in the limits mentioned above) that activates or deactivates genes for melanin (and therefore black stripes). There is a lot more going on, of course. Molecules diffuse, build up thresholds, interact with each other and genes.
The end result is this, though:
Fur patterns are highly random and individual! Like fingerprints, they can be used to identify an individuum and differentiate it from any other individuum of the same species.
But it will not be possible to relate it to any of its parents or recognize its children based on their fur pattern.
Unfortunately, this is exactly what happens with fur patterns in Planet Zoo!
Animals with patterns will pass parts of these patterns to their children and make them “trackable”.
This must have been a challenge to code and should rightfully be a source of great pride for the executive programmer.
Unfortunately, it was also completely unnecessary and even a wrong representation of real biological mechanisms.
A pure (and easy to implement) random pattern choice would have been way better and I hope, FDev will have the self-confidence to step back from their previous implementation, when they introduce the way more suitable fur color genetics!
So, in conclusion:
Genetically determined fur colors: Hell yes!
Genetically determined fur patterns: No please!
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Edit: Different animals feature different mechanisms for fur color variations, by the way. The coloration of tricolor cats is located on their sex chromosomes. Where on the cat’s skin which genes are active is random again.