how new characteristics enter gene pool?

i look for simple answer to this to help my sister. one thing i look at it say about mutation.

This site may help your sister.

http://evolution.mbdojo.com/evolution-for-beginners.html

thanks ms. sue i tell her about it :)

You're welcome.

I've asked another tutor to help you with your other question.

aww that very nice of you ms. sue :D thank you very very much :D

To understand how new characteristics enter the gene pool, we need to look at the process of evolution. One way new characteristics can enter the gene pool is through mutations.

Mutations are random changes that occur in the DNA of an organism. They can happen naturally or be induced by factors like radiation or chemicals. When a mutation occurs in a reproductive cell, such as a sperm or egg, it can be passed on to offspring and become part of the gene pool.

Some mutations can be harmful or cause genetic disorders, but others may be beneficial or provide an advantage to an organism in its environment. For example, a mutation that allows an organism to digest a new food source more efficiently could increase its chances of survival and reproduction.

If the mutated organism reproduces successfully and passes on its genes to the next generation, the new characteristic encoded by the mutated gene becomes part of the gene pool. Over time, through the process of natural selection, beneficial mutations can spread through a population, while harmful mutations tend to be eliminated.

It's important to note that not all new characteristics arise solely from mutations. Other mechanisms, such as genetic recombination during sexual reproduction and gene flow between populations, can also introduce new genetic variation into a gene pool.