Why is variation important to species?
Different species have different characteristics from each other. The differences between the individuals in a species is called variation. Variation helps a species to survive, by causing individuals of a species to be genetically and physically different.
What is variation and why it is important?
It helps in better survival of an organism. Accumulation of a particular variation over time leads to speciation. Variation results in genetic drift where same species are distanced. The useful variations are passed on to the next generation which is necessary for adaptation of an organism.
What would happen if there was no genetic variation?
Without genetic variation, a population cannot evolve in response to changing environmental variables and, as a result, may face an increased risk of extinction. For example, if a population is exposed to a new disease, selection will act on genes for resistance to the disease if they exist in the population.
Why is variation important to humans?
Most variation occurs within populations. Analysis of human genetic variation also confirms that humans share much of their genetic information with the rest of the natural world—an indication of the relatedness of all life by descent with modification from common ancestors.
What reduces genetic variation?
Sources of Decreased Variation Mutation, recombination, and gene flow all act to increase the amount of variation in the genotypes of a given population. There are also forces at work that act to decrease this variability.
What are the two advantages of variation?
it produces variation in the offspring. the species can adapt to new environments due to variation, which gives them a survival advantage. a disease or change in environment is less likely to affect all the individuals in a population.
What are 2 causes of 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).