Genetic Variation May Occur In A Population

Genetic Variation are the differences within individuals in a population. They are what make us genetically different from one another. Genetic variation occur because of mutations in our DNA and recombination. There are multiple types of mutation such as point mutations or chromosome mutations. Point mutations are the most common where only a single DNA nucleotide is affected. Within point mutations are frameshift and substitution. Frameshift mutations are when a base is either added or deleted. The ribosome that reads the DNA, reads every base 3 bases at a time. If a base is added, there will be a left over base. If a base is deleted, there will be two left over bases that will not be read. There is also substitution which is when one base is switched for another sometimes it has not affect since that same base might also code for the same codon. Other times, the base will have an affect on the amino acids as it is ended earlier that intended. Another reason for mutations is recombination. Recombination is the process of re-combining things. Recombination happens sexual reproduction and during meiosis. Mutations that happen during sexual reproduction is random fertilization. It is when any sperm and egg meet randomly during fertilization. Recombination also happens during sperm and egg production or meiois. Mutations also occur during meiosis. Meiosis is what makes the gametes or the sperm and egg.
For example, humans would not be able to drink drink milk without evolving for new genes. Our food also mutated and gew is size which helped Humans with getting bigger sized food. Overall, genetic mutations are important because they help us evolve as we adapt to our living