What environmental factors can lead to genetic variation?

What are 3 causes of genetic variation?

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).

Which factors can lead to genetic variation?

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).

What is environmental variation?

the ability of an organism to alter greatly its PHENOTYPE depending upon environmental conditions. The phenomenon is seen most clearly in plants, perhaps because they are fixed in the ground.

What are the 4 main sources of genetic variation?

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).

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Which environmental factor could lead to a decrease in genetic variation in a population of tuna?

Answer: The environmental factor that could lead to a decrease in genetic variation in a tuna population is an increase in pollution (second option).

How does environmental pressure cause natural selection?

Natural selection occurs when environmental pressures favor certain traits that are passed on to offspring. … Natural selection acts on populations. Individuals do not evolve in genetic evolutionary terms. Individuals may mutate, but natural selection acts by shifting the characteristics of the population as a whole.

Which feature is due to environmental variation only?

Variation caused by the surroundings is called environmental variation . Here are some other examples of features that show environmental variation: flower colour in hydrangeas (these plants produce blue flowers in acidic soil and pink flowers in alkaline soil)

What is inherited and environmental variation?

The differences in characteristics between individuals of the same species is called variation . … This is inherited variation. Some variation is the result of differences in the surroundings, or what an individual does. This is called environmental variation.

What is genetic variation and environmental variation?

The main difference between genetic variation and environmental variation is that genetic variation is the variation of the genotype between two individuals within the same species whereas environmental variation is the dependence of the phenotype upon the environmental factors.

What are the five environmental factors?

Environmental factors include temperature, food, pollutants, population density, sound, light, and parasites.

What are the 2 main causes of variation?

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.

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What are the 3 primary sources 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.

How does segregation lead to genetic variation?

During segregation, only one chromosome from each homologous / pair is placed into the new cells / gametes made. … Therefore, genetic variation is achieved / increased because each new cell has a different combination of alleles from each other and only ½ the chromosomes as the parent cell.