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Monsanto uses Round Up to kill weeds and has genetically made corn so that it grows with the Round Up. So areas that grow corn have no milkweed and the monarch butterfly needs milkweed to survive. Many garden clubs are encouraging people to grow milkweed in their gardens and get highway departments to stop mowing roadsides where milkweed grow.
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What causes many endangered species that are now found only in zoos to have very little genetic variations?
Founder effect refers to the loss of genetic variation when a new colony is established by a very small number of individuals from a larger population. As a result of the loss of genetic variation, the new population may be distinctively different.Bottleneck effect is an evolutionary event in which a significant percentage of a population or species is killed or otherwise prevented from reproducing, and the population is reduced by 50% or more, often by several orders of magnitude.Population bottlenecks increase genetic drift, as the rate of drift is inversely proportional to the population size.They also increase inbreeding due to the reduced pool of possible mates.
Which would most likely decrease the genetic variation in the human population?
If the human population was reduced to a very small number of interbreeding individual then this small population, denied outbreeding, would have very little genetic variation. Humans, who went through a bottleneck event about 70,000 years ago, are considered a " small " species because they have little genetic variation in comparison to many other species. Google cheetah to see how this concept works.
How does genetic engineering help in crop yield?
Genetic engineering enhances crop yield by introducing specific genes that confer traits such as pest resistance, drought tolerance, and improved nutritional content. These modifications can lead to increased productivity and reduced losses from environmental stresses and diseases. Additionally, genetically engineered crops can be optimized for faster growth and better resource utilization, allowing farmers to achieve higher yields in varying conditions. Overall, this technology contributes to more sustainable agriculture by maximizing output while minimizing inputs.
Why oxygen can not be liquefied at room temperature?
because both reduced temperature and reduced pressure are necessary for liquification of any gas...at room temp if you achieve the corresponding reduced pressure even then the reduced temperature condition is not fulfilled.....so it can not be liquified...univristy of engineering and technology Lahore
Does genetic drift increase or decrease genetic variation in populations and why?
It is important to understand that each individual has different genes. Genes can be lost if an individual dies without reproducing. To answer your question: There are two type of effects caused by Genetic Drift. The founder effect happens when a few species inhabit a new territory. If only those species reproduce then there are less genes in the gene pool and that leads to less variation. This can happen if storms sweep birds to a previously uninhabited island. The other effect is the bottleneck effect. This happens if a disease or poaching drastically reduces the number of individuals in a population. Since there are less individuals who can reproduce there are not as many genes that can be passed down.
How would genetic drift affect a population in genetic equilibrium?
Genetic drift can disrupt genetic equilibrium by causing random fluctuations in allele frequencies within a population. Over time, genetic drift can lead to the loss of alleles, reduced genetic diversity, and potential changes in the population's genetic composition, deviating it from equilibrium.
Which breeding system reduces genetic variation in a population?
Inbreeding is a breeding system that reduces genetic variation in a population. Inbreeding occurs when closely related individuals mate, leading to an increase in homozygosity and a decrease in genetic diversity within the population. This can result in an increased prevalence of genetic disorders and reduced fitness in the population.
Types of genetic drift?
There are two main types of genetic drift: population bottleneck and founder effect. Population bottleneck occurs when a population's size is drastically reduced, leading to a loss of genetic diversity. Founder effect occurs when a small group of individuals establishes a new population with limited genetic variation.
What are the potential consequences of outbreeding depression on the genetic diversity and fitness of a population?
Outbreeding depression can lead to reduced genetic diversity and lower fitness in a population. This occurs when individuals from different populations breed, resulting in offspring that may have reduced adaptability and survival rates. Over time, this can weaken the overall health and resilience of the population.
Is chicken inbreeding a problem that can have negative consequences on the health and genetic diversity of the chicken population?
Yes, chicken inbreeding can lead to negative consequences such as reduced genetic diversity, increased risk of genetic disorders, and weakened immune systems in the chicken population.
Does the genotypes and phenotypes are likely to occur at different frequencies in both the original and reduced population because of genetic drift?
Yes, genetic drift can cause changes in the frequency of genotypes and phenotypes in a population over time. In a small population experiencing genetic drift, certain genotypes and phenotypes may become more common by chance, while others may be lost. This can lead to differences in the distribution of traits between the original and reduced population.
What causes many endangered species that are now found only in zoos to have very little genetic variations?
Founder effect refers to the loss of genetic variation when a new colony is established by a very small number of individuals from a larger population. As a result of the loss of genetic variation, the new population may be distinctively different.Bottleneck effect is an evolutionary event in which a significant percentage of a population or species is killed or otherwise prevented from reproducing, and the population is reduced by 50% or more, often by several orders of magnitude.Population bottlenecks increase genetic drift, as the rate of drift is inversely proportional to the population size.They also increase inbreeding due to the reduced pool of possible mates.
Why reducing biodiversity can lead to new problems?
Reducing biodiversity of a population can result in a loss of allele and reduced overall fitness, ultimately resulting in a decrease in genetic diversity. This reduced population is now vulnerable to diseases due to reduced biodiversity (e.g. Great Irish Famine).
What effect does a bottleneck have on the allele frequency of a population?
A bottleneck can lead to a significant reduction in the genetic diversity of a population, causing certain alleles to be lost and others to become more common. This can increase the frequency of rare alleles and result in genetic drift, potentially leading to an increase in genetic diseases or reduced fitness in the population.
What might cause a lack of genetic variation in a species and how might it affect the species?
A lack of genetic variation in a species can be caused by factors such as inbreeding, habitat fragmentation, or a population bottleneck, where a significant portion of the population is suddenly reduced. This reduced genetic diversity can lead to increased susceptibility to diseases, reduced adaptability to environmental changes, and a higher likelihood of extinction. Over time, the lack of variation may result in decreased overall fitness and resilience of the species.
When genetic drift occurs due to a dramatic reduction in population?
When genetic drift occurs due to a dramatic reduction in population, it is called a bottleneck effect. This can lead to a loss of genetic diversity as the surviving individuals may not represent the full range of genetic variation in the original population. As a result, the population may experience inbreeding and reduced ability to adapt to environmental changes, increasing its vulnerability to extinction.
What is the term that describes what occurs when genetic drift results in the formation of a new population that has less genetic variation than the original population had?
The term that describes this phenomenon is "founder effect." It occurs when a small group of individuals breaks away from a larger population to establish a new population, leading to reduced genetic variation. This can result in a population that is genetically distinct and may carry different allele frequencies compared to the original population.
