Is genetic variation caused by environmental factors?

Genetic variation among plant populations often occurs along different climatic gradients, such as temperature and precipitation gradients (Keller et al., 2011). … Environmental factors are often responsible for the patterns of genetic structure observed at small spatial scales (Sacks, Brown, & Ernest, 2004).

What factors cause 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 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).

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.

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)

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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).

What are the 2 main causes of variation?

The two main causes of variation are mutation and genetic recombination in sexual reproduction.

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.

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.

How does the environment affect inherited traits?

Internal and external environmental factors, like gender and temperature, influence gene expression. … Similarly, drugs, chemicals, temperature, and light are among the external environmental factors that can determine which genes are turned on and off, thereby influencing the way an organism develops and functions.

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How does the environment cause variation in living things?

Environmental causes of variation

Characteristics of animal and plant species can be affected by factors such as climate, diet, accidents, culture and lifestyle. … Another example is that of a plant that grows in the shade of a big tree – it will grow taller to reach more light.

What are some environmental variations?

For example, environmental variations in humans could be: Hair length – what length you choose to have your hair. Scars – caused by accidents personal to you. Muscle strength – dependent on how much exercise you do.

What is inherited genetic variation?

Inherited (or hereditary) variants are passed from parent to child and are present throughout a person’s life in virtually every cell in the body. These variants are also called germline variants because they are present in the parent’s egg or sperm cells, which are also called germ cells.