What is the meaning of genetic variation?
Genetic variation is the presence of differences in sequences of genes between individual organisms of a species. It enables natural selection, one of the primary forces driving the evolution of life. 5 – 8.
What is genetic variation give an example?
Genetic variation results in different forms, or alleles?, of genes. For example, if we look at eye colour, people with blue eyes have one allele of the gene for eye colour, whereas people with brown eyes will have a different allele of the gene.
Why is genetic variation important simple definition?
Genetic variation is necessary in natural selection. 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.
What is genetic variation class 12?
Complete answer: Genetic variation is defined as the genetic makeup of organisms within a population change. The alleles or the various versions of a particular gene are inherited from parents to off-springs giving them their characteristic features.
What does variation mean in evolution?
(genetics) A variant or a mutant. Supplement. Variation refers to the differences or deviations from the recognized norm or standard. It may be a modification in structure, form or function in an organism, deviating from other organisms of the same species or group.
What is genetic variation in biology Shaalaa?
Genetic variations are caused due to various aspects of mutation, recombination, and migration. The change in gene and gene frequencies is known as genetic variation.
What is variation in biology class 9?
variation, in biology, any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors on the expression of the genetic potentials (phenotypic variation).
What is variation in reproduction?
Variation refers to the differences between members of the same species. Having variation within a species means that if the environment changes there may be individuals within the species more able to withstand the change and survive.
What causes genetic variation?
Genetic variation describes the differences in our DNA and how the resulting offspring will be genetically different from the parents. Mutation events, meiosis and random fertilisation, cause genetic variation.
What is variation in biology 12th?
Hint: Variation is any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences or by the effect of environmental factors on the expression of genotypic character.
What are the four sources of genetic variation?
– Mutations. – Genetic recombination in sexual reproduction. – Lateral gene transfer.
What factors affect genetic variation?
Stabilizing or balancing selection: It leads to the elimination of organisms having overspecialized characters and maintains homogenous population which is genetically constant.
What are the possible causes of genetic variation?
Genetic variation. Genetic variation is necessary in natural selection.
What do you think the term genetic variation mean?
The differences in characteristics between individuals of the same is called .