Genetic variation within a species can result from a few different sources. Mutations, the changes in the sequences of genes in DNA, are one source of genetic variation. Genetic variation in a group of organisms enables some organisms to survive better than others in the environment in which they live.

Although members of a species have many features in common they are not identical to each other. Variation occurs as a result of mutations that create new alleles of genes. Variation within a population makes it possible for a population to evolve over time in response to changing environmental conditions.

Most members of a species show differences, or “variations”. If the statement is true, write true. If it is false, change the words in quotes or words to make the statement true. A diagram that shows how organisms might be related is called “gradualism”.

Finally, changing patterns of selection over time or space can help to maintain genetic variation in a population. If selection patterns fluctuate over time, different alleles or genotypes may enjoy greater fitness at different times. The overall effect may be that both alleles persist in a population.

For a given population, there are three sources of variation: mutation, recombination, and immigration of genes. However, recombination by itself does not produce variation unless alleles are segregating already at different loci; otherwise there is nothing to recombine.

Genetic variation describes naturally occurring genetic differences among individuals of the same species. This variation permits flexibility and survival of a population in the face of changing environmental circumstances.

Mutations are the original source of genetic variation. A mutation is a permanent alteration to a DNA sequence. De novo (new) mutations occur when there is an error during DNA replication that is not corrected by DNA repair enzymes.

nematode worm

A person’s skin color, hair color, dimples, freckles, and blood type are all examples of genetic variations that can occur in a human population. Examples of genetic variation in plants include the modified leaves of carnivorous plants and the development of flowers that resemble insects to lure plant pollinators.

Natural selection acts upon two major sources of genetic variation: mutations and recombination of genes through sexual reproduction.

Genetic variation refers to diversity in gene frequencies. Genetic variation can refer to differences between individuals or to differences between populations. Mutation is the ultimate source of genetic variation, but mechanisms such as sexual reproduction and genetic drift contribute to it as well.

Genetic variation is advantageous to a population because it enables some individuals to adapt to the environment while maintaining the survival of the 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).

Variation

• Evolution.
• Mutation.
• Single nucleotide polymorphism.
• Antigenic shift.
• Antigenic drift.
• Polymorphism.
• Sexual dimorphism.
• Bergmann’s Rule.

Variation is important because it causes evolution and is the basis of heredity. It is advantageous to a population as it enables few individuals to adapt to the environment changes thus, enabling the survival of the population.

Variation can be defined as the differences among individuals within the same species which develops due to the mixing and assortment of genes of the parents that is passed onto the offspring’s. For example, we keep pets like dogs and cats.

No, variations are not apparent differences in all cases. It is very apparent.

Variations can be beneficial or harmful according to the ecological niche of the organism. A variation suitable for the particular niche is selected by nature in evolution. Thus variations are necessary for the survival of the species. Variation is important for the evolution of the species.

Phenotypes can be caused by genes, environmental factors, or a combination of both. Phenotypic variation, then, is the variability in phenotypes that exists in a population. For example, people come in all shapes and sizes: height, weight, and body shape are phenotypes that vary.

Answer. The variation is important and beneficial for species as it allows a species to adapt to a changing environment. Only those who adopt the changes can survive in harsher conditions by adapting to the changes. For an individual, the variation doesn’t matter in most of the conditions.

Answer. variations are more beneficial for the species because it allows organisms to exist in diverse habitats or niches. In its absence a species may remain restricted to a particular area. However, if it occurs in population it will help them to colonise other habitats and survive.

Answer: These traits are the expression of genes that are copied and passed on to offspring during reproduction. Mutations in these genes can produce new or altered traits, resulting in heritable differences (genetic variation) between organisms.

How does the creation of variations in a species promote survival? Hint: The variations ensured the species’ survival as they allowed the population members to adapt to the changing climate and conditions. The species are more suited for the changed atmosphere. The continuity of the species is thus preserved.