Which environmental factor would likely lead to an increase in genetic variation in a population?
Genetic variation will increase because of a new habitat and food source. A scientist has been tracking and studying a population of deer in Yellowstone National Park. He surveys the population every six months. Usually, the population is thriving and has a gene pool with a wide variety of traits.
How do environmental factors influence genetic variation?
Sometimes the environment changes a gene—either its DNA sequence or its activity level. Either of these effects can change the proteins that are made from a gene, which in turn affects traits. Some harmful environmental factors can change a gene's nucleotide sequence. For example, UV radiation can break DNA strands.
What are the 5 factors that influence genetic variability in a population?
ADVERTISEMENTS: 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.
What factors affect the variations of gene pools?
There are four forces of evolution: mutation, gene flow, genetic drift, and natural selection. Mutations create new genetic variations in a gene pool.
Which of the following decreases genetic variation?
Inbreeding, genetic drift, restricted gene flow, and small population size all contribute to a reduction in genetic diversity.
Which of the following is most likely to decrease genetic variation?
So, the correct answer is 'Stabilising natural selection'.
What is genetic and environmental factors?
The expression of genes in an organism can be influenced by the environment, including the external world in which the organism is located or develops, as well as the organism's internal world, which includes such factors as its hormones and metabolism.
How do environmental factors influence genetic traits quizlet?
Environmental factors are determined by genetic traits. Environmental factors have no influence on genetic traits. What is the evidence that depression can be linked to genetic as well as environmental factors? All individuals in similar stressful environments do not experience depression.
What factors reduce genetic diversity?
Inbreeding, genetic drift, restricted gene flow, and small population size all contribute to a reduction in genetic diversity.
How does a decrease in genetic variation affect a population?
Low genetic diversity means that there is a limited variety of alleles for genes within that species and so there are not many differences between individuals. This can mean that there are fewer opportunities to adapt to environmental changes. Low genetic diversity often occurs due to habitat loss.
What decreases the amount of variation in a population?
Genetic Drift: Genes lost to a small population, as a result of a chance event, means that certain combinations cannot arise and other combinations will occur very infrequently.
What is loss of genetic variation?
Loss of genetic diversity increases the risk of extinction of a population through inbreeding depression. In addition, the number of deleterious genetic variations, which might accumulate in a small population through genetic drift, can also make the population vulnerable.
What decreases genetic variation?
Inbreeding, genetic drift, restricted gene flow, and small population size all contribute to a reduction in genetic diversity.
Which of the following processes will lead to a decrease in genetic diversity?
So, the correct answer is 'Stabilising natural selection'.
What is an example of an environmental factor?
Environmental factors include temperature, food, pollutants, population density, sound, light, and parasites.
How do environmental factors alter gene expression quizlet?
Environmental factors can affect gene expression such as: the production of skin pigmentation during exposure to sunlight in humans. In embryonic development, the embryo contains an uneven distribution of chemicals called morphogens.
How do heredity and environments affect development quizlet?
Heredity and the environment both play major roles in the development of individuals, be it physical, behavioral, and personality traits. In the development stage, the environment influences a kids mind and some physical characteristics. This may in in the form of parenting and simuli.
Which of the following reduces genetic variation?
So, the correct answer is 'Stabilising natural selection'.
What are the causes of the loss of genetic diversity?
Small, fragmented populations can lead to loss of genetic diversity because fewer individuals can survive in the remaining habitat so fewer individuals breed to pass on their alleles. In small populations, the choice of mates is also limited.
What reduces variation in a population quizlet?
Gene flow tends to reduce genetic differences between populations. If it is extensive enough, gene flow can eventually mix neighboring populations into a single population with a common gene pool.
Which of these is most likely to decrease genetic variation in a population?
So, the correct answer is 'Stabilising natural selection'.
What are the effect of the environmental factors?
The 8 Environmental Factors That Can Impact Your Health A number of specific environmental issues can impede human health and wellness. These issues include chemical pollution, air pollution, climate change, disease-causing microbes, lack of access to health care, poor infrastructure, and poor water quality.
What are two environmental factors that are likely to affect gene expression quizlet?
What are some environmental factors that can influence gene expression? Temperature, nutrition, light, chemicals, infectious agents, age, and gender/sex.
Which of the following factors are influenced by heredity?
Different characteristics of growth and development like intelligence, aptitudes, body structure, height, weight, color of hair and eyes are highly influenced by heredity.
How can genetic diversity be reduced?
Genetic diversity is important because it gives species a better chance of survival. However, genetic diversity can be lost when populations get smaller and isolated, which decreases a species' ability to adapt and survive.
What decreases variation in a population?
Inbreeding, genetic drift, restricted gene flow, and small population size all contribute to a reduction in genetic diversity.
Which of the following will tend to reduce genetic variation within a population?
Genetic drift tends to reduce genetic variation through losses of alleles. Gene flow consists of genetic additions or subtractions from a population, resulting from movement of fertile individuals or gametes.
What are the 4 environmental factors?
Air, water, climate, soil, natural vegetation and landforms are all environmental factors. By definition, the environmental factors affect everyday living, and play a key role in bringing health differences across the geographic areas.
What is the effect environmental resistance on a population?
Environmental Resistance can reduce the reproductive rate and average life span and increase the death rate of young. As Environmental Resistance increases, population growth slows and eventually stops, likely near (k).
How do environmental factors affect gene expression quizlet?
Environmental factors can affect gene expression such as: the production of skin pigmentation during exposure to sunlight in humans. In embryonic development, the embryo contains an uneven distribution of chemicals called morphogens.