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Imagine a conception occurs with a random mutation that causes a miscarriage. That's evolution in a few months. Imagine one that causes someone to be infertile
by haihaibye 9y ago
Imagine a conception occurs with a random mutation that causes a miscarriage. That's evolution in a few months.
Imagine one that causes someone to be infertile. The balance of genetics changes (evolution) in a generation.
Africa went from 1/2 the population of Europe in 1950 to 1.6x the size today. The gene frequencies on those two continents are different -
thus there has clearly been differential fitness (in the hundreds of millions in a lifetime)
- hellofunk 9y ago> That's evolution in a few months. A single isolated event with no impact on the species is not the definition that most would use for evolution. And even if it had an effect on that individual family, evolution is about nature selecting that particular mutation, which may not happen at all. So I don't support the premise of your argument.
- haihaibye 9y agoEvolution is the change in gene frequencies over time. Accepting my premise is just knowing the textbook definition. I think what you are trying to describe is "novel fitness increasing mutations" - these won't be detectable for ages as it takes time to spread through a population. Single isolated events matter - All mutations start off in an individual, they then increase or decrease in frequency.