Question

How genes helps in variation . explain

Answer 1

In natural selection, organisms with environmentally selected traits are better able to adapt to the environment and pass on their genes. Major causes of variation include mutations, gene flow, and sexual reproduction. DNA mutation causes genetic variation by altering the genes of individuals in a population.

Answer 2

Individuals of a species have similar characteristics but they are rarely identical, the difference between them is called variation.

Genes are the chemicals in DNA which have the ability to duplicate themselves.

Genetic variation is a term used to describe the variation in the DNA sequence in each of our genomes.

Genetic variation occurs as alleles in gametes are separated and randomly united upon fertilization. The genetic recombination of genes also occurs during crossing over or the swapping of gene segments in homologous chromosomes during meiosis.

Genetic variation is caused by mutation,random fertilization, and recombination between homologous chromosomes during meiosis.

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