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This is a very simplified simulation that tries to illustrate that the "evolution is random" idea is a misconception. It does this by separating the randomness of mutation from the non-random direction that selection provides.
In each generation, each individual has a random chance of having a mutation, set by the mutation rate (here 10%).
There are ten possible mutations, assigned at random. Note that for this particular "cold" environment, three are "more fit", one neutral or back to original state, three are "less fit", and three are lethal.
| * | Indicates a mutation in the offspring |
| Most favored mutation, increases by one in each generation, unless all other offspring are most favored | |
| Favored mutation, increases by one in each generation, unless out-competed by most favored | |
| Favored mutation, increases by one in each generation, unless out-competed by most favored | |
| Original state or neutral mutation, gives only one offspring, unless out-competed by most favored or favored | |
| Disfavored mutation, gives only one offspring, unless out-competed by most favored, favored or neutral | |
| Disfavored mutation, gives only one offspring, unless out-competed by most favored, favored or neutral | |
| Disfavored mutation, gives only one offspring, unless out-competed by most favored, favored or neutral | |
| Lethal mutation, gives no offspring | |
| Lethal mutation, gives no offspring | |
| Lethal mutation, gives no offspring | |
| Dead |
20 individuals per generation, 25 generations, mutation rate 10%, "cold" environment.
| Gen. 0 | * | ||||||||||||||||||||
| Gen. 1 | * | * | * | ||||||||||||||||||
| Gen. 2 | * | * | * | ||||||||||||||||||
| Gen. 3 | * | ||||||||||||||||||||
| Gen. 4 | * | * | |||||||||||||||||||
| Gen. 5 | * | * | |||||||||||||||||||
| Gen. 6 | * | * | |||||||||||||||||||
| Gen. 7 | * | ||||||||||||||||||||
| Gen. 8 | * | * | |||||||||||||||||||
| Gen. 9 | * | * | * | ||||||||||||||||||
| Gen. 10 | |||||||||||||||||||||
| Gen. 11 | * | * | |||||||||||||||||||
| Gen. 12 | * | * | |||||||||||||||||||
| Gen. 13 | * | ||||||||||||||||||||
| Gen. 14 | * | ||||||||||||||||||||
| Gen. 15 | * | ||||||||||||||||||||
| Gen. 16 | * | * | |||||||||||||||||||
| Gen. 17 | * | * | * | ||||||||||||||||||
| Gen. 18 | |||||||||||||||||||||
| Gen. 19 | * | * | * | * | |||||||||||||||||
| Gen. 20 | * | ||||||||||||||||||||
| Gen. 21 | * | * | * | * | * | ||||||||||||||||
| Gen. 22 | * | ||||||||||||||||||||
| Gen. 23 | * | * | |||||||||||||||||||
| Gen. 24 | * |
To try another simulation with the same parameters, reload the page.
If you want to try other parameters, enter them here and click the submit button:
© 2004 Bo Johansson