Which of the following is a correctly stated condition that must be true for a population to be in Hardy Weinberg equilibrium?
The conditions to maintain the Hardy-Weinberg equilibrium are: no mutation, no gene flow, large population size, random mating, and no natural selection.
What could lead members of a single species in a specific geographical area with a variety of habitats to evolve new traits?
What could lead members of a single species in a specific geographical area with a variety of habitats to evolve new traits? Survival in one habitat or another in a single geographical area will lead to the evolution of different traits in the two groups.
What causes two different populations of the same species to have many of the same alleles first arose after the populations had split?
Description: (a) What causes two different populations of the same species to have many of the same alleles, even if the alleles first arose after the populations had split? Gene flow occurs between populations.
Why is natural selection based entirely on reproductive success quizlet?
Why is natural selection based entirely on reproductive success? The more times an allele is passed on, the more common the allele becomes. In the next generation, the same successful allele will result in each of the offspring having many children as well.
When populations are reduced following a major disaster the resulting random change in allele frequencies is called the?
The random change in allele frequencies is called genetic drift. Genetic drift can lead to the fixation of an allele and occurs rapidly in small populations.
Which of the following statements about the amoeba population described in the final stage is true?
Which of the following statements about the amoeba population described at the end of the tutorial is true? It is more vulnerable to extinction due to lack of genetic variation.
When a population becomes isolated from another population of the same species over a long period of time?
Allopatric speciation (1) occurs when a species separates into two separate groups which are isolated from one another. A physical barrier, such as a mountain range or a waterway, makes it impossible for them to breed with one another.
What will occur when a population becomes divided by an event such as New River forming?
Isolation of populations leading to allopatric speciation can occur in a variety of ways: a river forming a new branch, erosion forming a new valley, a group of organisms traveling to a new location without the ability to return, or seeds floating over the ocean to an island.
When a species invades a new habitat and evolves rapidly into several new species what has occurred?
Which one of the following is not one of the five major features to emerge in the evolution of humans? behavioral isolation. When a species invades a new habitat and evolves rapidly into several new species to better exploit new resources (e.g., Darwin's Finches), what has occurred? allopatric speciation.
Which of the following are causes of evolutionary change select all that apply?
All four options, gene flow, genetic drift, mutation, and natural selection are all causes of evolutionary change.
When a population is severely reduced by an environmental disaster such as a fire the result is a?
The bottleneck effect is an extreme example of genetic drift that happens when the size of a population is severely reduced. Events like natural disasters (earthquakes, floods, fires) can decimate a population, killing most individuals and leaving behind a small, random assortment of survivors.
What effect occurs when a few individuals break away from a population and form a new smaller population?
Founder effect occurs when a few individuals start, or found, a new population.
Which of the following are examples of events that could cause genetic drift in a population?
The bottleneck effect is an extreme example of genetic drift that happens when the size of a population is severely reduced. Events like natural disasters (earthquakes, floods, fires) can decimate a population, killing most individuals and leaving behind a small, random assortment of survivors.
What is an example of the bottleneck effect?
An example of a Bottleneck Effect Northern elephant seals have reduced genetic variation probably because of a population bottleneck effect humans inflicted on them in the 1890s. Hunting and killing lowered their population size to a few of as 20 individuals at the end of the 19th century.
What are the causes of rapid evolution in a population?
Changing environmental conditions can cause strong selective pressure, often affecting a variety of critical ecological and life history traits (including species interactions and community structure). This can induce species to evolve rapidly, leading to genetic and phenotypic shifts in a matter of generations.
Why did evolutionary changes occur?
Natural selection results in organisms that are more likely to survive and reproduce. Another driving force behind evolution is genetic drift, which describes random fluctuations in allele frequencies in a population.
Which of the following is the cause of evolution in this population?
There are five key mechanisms that cause a population, a group of interacting organisms of a single species, to exhibit a change in allele frequency from one generation to the next. These are evolution by: mutation, genetic drift, gene flow, non-random mating, and natural selection.
Why is it called bottleneck effect?
The bottleneck effect, also known as a population bottleneck, is when a species goes through an event that suddenly and significantly reduces its population. Think about how only so much stuff can come out of the neck of a narrow bottle at a time.
What causes genetic drift to occur?
Genetic drift is a random process that can lead to large changes in populations over a short period of time. Random drift is caused by recurring small population sizes, severe reductions in population size called "bottlenecks" and founder events where a new population starts from a small number of individuals.
What causes genetic drift quizlet?
Genetic drift that occurs when a few individuals become isolated from a larger population, with the result that the new population's gene pool is not reflective of the original population.
What is the bottleneck effect quizlet?
Bottleneck effect. is a change in allele frequency following a dramatic reduction in the size of a population. Founder effect. In which alleles frequencies change as a result of a small subgroup of a population.
What causes population bottleneck?
A population bottleneck is an event that drastically reduces the size of a population. The bottleneck may be caused by various events, such as an environmental disaster, the hunting of a species to the point of extinction, or habitat destruction that results in the deaths of organisms.
What is an example of rapid evolution?
For example, rapid evolution is important in fisheries where intense fishing causes fish to evolve traits that let them escape fishing nets. Antibiotic resistance and increased virulence in pathogens are examples where rapid evolution impacts human health.
What causes evolution to occur?
One mechanism that drives evolution is natural selection, which is a process that increases the frequency of advantageous alleles in a population. Natural selection results in organisms that are more likely to survive and reproduce.
How does evolutionary change occur quizlet?
Natural Selection: is a mechanism of evolution that occurs when there is heritable variation for a trait and individuals with one version of the trait have greater reproductive success than do individuals with a different version of the trait.
How does evolution occur quizlet?
The process in which organisms change over time and is based off phenotype. When there is a change in the environment and the gene pool causing some to die and some to live.
What happens to a population when biological evolution takes place?
What happens to a population when biological evolution takes place. A change takes place in the genetic traits passed from one generation of the population to the next.
What increases genetic variation when animals move from one population to another population?
Animals experience gene flow when individuals leave a family group or herd to join other populations. The flow of individuals in and out of a population introduces new alleles and increases genetic variation within that population.
What is genetic drift quizlet?
Genetic drift. Any random change to the allele frequency of a population due to a chance event.
What is genetic drift quizlet mastering biology?
What is genetic drift? A change in allele frequencies caused by random events.