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RE: How unique are you? The science of individual differences.
I remember from my Biology classes the inactivation of the X chromosomes in females. All cells in a female body have the sexual chromosomal pair as XX. However, they are clever and during development, these inactivate one of those to prevent overflow of information. So in the end there is only one X chromosome active & the other inactive. The catch is, it happens at random unless there is faulty genetic code in one (leading to that being deactivated).
This just makes every woman even more different in they own unique way.
In the end we are sacks of particles with unpredictable (probabilistic) patterns.
Indeed. This will in fact make a very interesting example and something you can observe on spots of cat fur as well. For a 8 cell organism which have identical twin the probability of having two twins exactly the same in terms of X in activation will be 1/28. Now put it on context of an orgnisms with over 10 trillion cells! So identical twin sisters would become unique just be sheer randomness of X inactivation. Thanks for adding this valuable comment. Really appreciate it.
I absolutely forgot that it was the reason about the spots on cat's fur!
Aaand, you are very welcome!