> That means 2/3 of the time- mutations do nothing or help the organism. Imagine you have a series of integers being multiplied. Each step, you increase 1/3 of

> That means 2/3 of the time- mutations do nothing or help the organism. Imagine you have a series of integers being multiplied. Each step, you increase 1/3 of them and decrease 1/3 of them - you leave the remaining 1/3 untouched. After enough steps, you have zero.