what are three factors that affect a gene pool?
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Some of the major factors which affect the genetic equilibrium and induce the variability in population are as follows: (A) Mutations (B) Recombinations during Sexual Reproduction (C) Genetic Drift (D) Gene Migration (Gene Flow) (E) Natural Selection.
907753
For a given population, there are three sources of variation: mutation, recombination, and immigration of genes.
100705
The Genetic Variation in a Population Is Caused by Multiple Factors. 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.
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['Environmental changes.', 'Cultural/mating preferences.', 'Population Immigration.', 'Genetic Mutation.']
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['Easy to Execute and Understand.', 'Control and Sense of Process.', 'Clustered Selection Eliminated.', 'Low Risk Factor.', 'Assumes Size of Population Can Be Determined.', 'Need for Natural Degree of Randomness.', 'Greater Risk of Data Manipulation.']
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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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Environmental factors include temperature, food, pollutants, population density, sound, light, and parasites. The diversity of environmental stresses that have been shown to cause an increase in asymmetry is probably not exclusive; many other kinds of stress might provide similar effects.
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The 3 biological factors affecting growth and development are: Genetic Inheritance. Gender. Hormones.
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People's weights are determined by multiple factors including their genetic background, eating habits, metabolic rate and their general activity level. Genes. Genes influence body weight by setting basic parameters on the body's metabolic efficiency (the efficiency with which the body burns calories).
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Gene duplication, mutation, or other processes can produce new genes and alleles and increase genetic variation. New genetic variation can be created within generations in a population, so a population with rapid reproduction rates will probably have high genetic variation.
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['Age. Female age is the most important factor affecting fertility. ... ', 'Previous Pregnancy. ... ', 'Duration of subfertility. ... ', 'Timing and Frequency of Sexual Intercourse. ... ', 'Lifestyle Factors.', 'Weight. ... ', 'Smoking. ... ', 'Caffeine.']
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Demographics can include any statistical factors that influence population growth or decline, but several parameters are particularly important: population size, density, age structure, fecundity (birth rates), mortality (death rates), and sex ratio (Dodge 2006).
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['Non-adaptive traits. -vestigial traits. ... ', 'Genetic constraints. -gene linkage (no crossover possible; indirect selection due to proximity to selected genes) ... ', 'fitness trade-offs. ... ', 'historical constraints.']
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The concept of genetic-environmental correlation states that our genes influence the environments that we are exposed to. ... The influence of heredity and environment changes with age, as genetic factors become more important in determining environment as people get older.
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Natural selection acts upon two major sources of genetic variation: mutations and recombination of genes through sexual reproduction. Most mutations do not affect the reproductive fitness of individuals -- some may be beneficial, some may be harmful, and many may be neutral. Mutation rates per gene are generally low.
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Factors include: food availability, predator density and disease risk. Density-independent factors are not influenced by a species population size. All species populations in the same ecosystem will be similarly affected, regardless of population size. Factors include: weather, climate and natural disasters.
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Researchers said the reasons were largely down to environmental factors – such as healthcare, nutrition and sanitation – rather than DNA. “About a third of the explanation could be genes, but that doesn't explain the change over time. Genes don't change that fast and they don't vary that much across the world.