how are variations caused what is their importance
Answers
Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).
The advantages of variation are as follows : It provides basis of evolution. It helps in maintaining life even in adverse conditions, as some individuals having variation can even survive in adverse environment
1) Variations are caused in individual due to natural selection.
2) Genetic drift caused by drastic change in the genes.
3) Changes in DNA during reproduction.
Genetic variation is essential for natural selection because natural selection can only increase or decrease frequency of alleles that already exist in the population...
Hope it helps you...
Plz mark as brainliest answer..