How does natural selection create a change in the allele frequency?

Answer 1

Natural selection weeds out the alleles that are bad for survival in the current enviorment thus causing the well adapted alleles to be more frequent since the organisms that have the beneficial allele will survive to reproduce more and have more offspring, passing on the gene. for an really good example, look up the peppered moth!

Answer 2

Natural selection is the process where individuals of a population are deemed unfit to survive or that more than one variation of individuals are deemed fit to survive and prosper. Depending on the situation, the allele frequency may be reduced or increased. Though, as mutations occur constantly, the allele frequencies of any population is ever changing.

Answer 3

Evolution is the change in allele frequency over time in a population of organisms.

Natural selection is the nonrandom survival and reproductive success of randomly varying organisms and one of the main drivers of evolution.

Answer 4

Organisms with slightly different traits, for instance sibling monkeys with a slightly different tail length or fur colour, have slightly different chances of finding food, finding mates, fathering fertile children. If a trait like that causes the bearers of that trait to, on average, produce more fertile offspring than those without that trait, and the trait is passed on to the offspring, then the number of children with the trait will grow, relative to the number of children without the trait. If the number of children with the trait grows, then that means that the frequencies of the genes causing that trait grows.

Answer 5

Let's say we have a population of crabs and snails. The snails have two phenotypes: round and blunt shells and sharp and pointy. The crabs' claws can only grab the sharp and pointy shells, therefore making those shells in the snail population less frequent.