Genetic variation is nonrandomly distributed among populations and species (Nevo, 1998), with distribution of alleles and genotypes over space and time often affected by numerous factors such as breeding system, seed dormancy and dispersal mechanism, geographic variation and range, life span and other life‐history …
What factors affect 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 environmental factors that can affect traits?
Food, temperature, sunlight, and water are examples of environmental factors that can affect an organism’s traits. Many characteristics of plants and animals involve both inheritance and the environment.
What is environmental variation in genetics?
Summary. Environmental variation (VE) in a quantitative trait – variation in phenotype that cannot be explained by genetic variation or identifiable genetic differences – can be regarded as being under some degree of genetic control.
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 three sources of genetic variation in a population?
Three sources of genetic variation are mutation, genetic recombination during sexual reproduction and lateral gene transfer.
Can the environment affect inherited traits?
Even though traits are inherited, they are also influenced by the environment. The environment and the characteristics of an organism are in a cause and effect relationship. Explanation: … Organisms are born with specific traits inherited from their parents, but the environment can influence them.
What is the difference between genetic and environmental factors?
Your genes hold the basic instructions for your body to grow and function, but they are far from the only thing controlling your traits. Most traits are shaped both by a person’s genes and by environmental factors. Environmental factors include everything outside of DNA that affects your traits.
Is age a genetic or environmental factor?
Results: Individual differences primarily reflected individual specific environmental influences at all ages. The increase in total variance across age groups was primarily due to genetic influences in the age groups 45–74 years and greater environmental influences in the oldest age group (>74).
How do environmental factors cause variation?
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.
How does the environment affect variation?
It is common practice to measure genetic variation by rearing genetically different individuals in shared environments. G × E interactions can be studied by manipulating growth conditions to examine the effects of specific environmental variables.
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.