The trait must give individuals an advantage in producing offspring that survive. this is called adaptive evolution required for a trait to become more common over time in a population.
How does a trait becomes more common over time in a population?
- Adaptive evolution is driven by positive natural selection, or the tendency for favorable features to rise in prevalence (frequency) in a population.
- A trait must have two features in order to be selected positively. To begin, the trait must be advantageous; that is, it must boost the organism's chances of surviving and reproducing.
- Second, the trait must be heritable in order to be handed down to the offspring of an organism.
- Beneficial features might range from protective coloring to the ability to utilize a new food source to a change in size or form that is beneficial in a specific environment.
- If a trait causes more offspring to share the trait, it is more likely to spread in the population than a trait that emerges at random.
- Selection happens at the molecular level when a particular DNA variant becomes more frequent as a result of its impact on the organisms that carry it.
varieties of the trait in the population wont make a trait more common over time in a population
eating some kinds of food wont make a trait more common over time in a population
trait does not need the result of an immediate change in the environment.
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