What is an example of genetic variation in biology?

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.

Which two are examples of genetic variation?

Examples of genetic variation in humans include blood group, skin colour and natural eye colour. Whether you have lobed or lobeless ears is due to genetic causes. Biological sex is also an inherited variation – whether you are male or female is a result of genes you inherited from your parents.

Which three examples are a source of genetic variation?

Three primary sources of genetic variation or genetic diversity in a population are mutation, genetic recombination and gene flow in the population or immigration of genes. Further reading: Adaptive Radiation. Microevolution.

What is an example of variation within a species?

Variation within species affects how organisms interact with each other and their surrounding environment. For example, the size of a fish’s mouth, known as its gape, varies and determines the size of prey it can eat.

What causes genetic variation in a population?

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).

How is genetic variation stored in a population?

Genetic variation is stored in a population’s gene pool—the combined alleles of all of the individuals in a population. An allele frequency is a measure of how common a certain allele is in the population.

How is variation caused within a population?

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. Gene flow leads to genetic variation as new individuals with different gene combinations migrate into a population.

Which of the following generates genetic variation within a population?

How is variation created in a population?

Solution : Occurrence of differences between organisms is called variation. New variation may arise during the process of DNA copying that already has variations accumulated from previous generations. Combining variations from two or more individuals would thus create new combinations of variations.

What are the types of genetic variation?

Types of genetic variation

  • Transition. interchange of the purine (Adenine/Guanine) or pyrimidine (Cytosine/Thymine) nucleic acids.
  • Transversion. interchange of a purine and pyrimidine nucleic acid (Figure 4)

How is genetic variation maintained in most populations?

Finally, several forms of natural selection act to maintain genetic variation rather than to eliminate it. These include balancing selection, frequency-dependent selection, and changing patterns of natural selection over time and space.