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Which evolutionary mechanisms could affect allele frequencies in a population being maintained in captivity?
Genetic drift, selection pressures imposed by captivity conditions, inbreeding, and genetic bottlenecks due to small population sizes are some evolutionary mechanisms that can affect allele frequencies in a population being maintained in captivity. These factors can lead to changes in the genetic diversity of the population over time.
What is balancing selection and how does it contribute to genetic diversity in biology?
Balancing selection is a type of natural selection that maintains genetic diversity by preserving different versions of a gene in a population. This occurs when multiple versions of a gene are advantageous in different environments or circumstances, preventing any one version from becoming fixed in the population. As a result, genetic diversity is maintained, allowing for adaptation to changing conditions and increasing the overall fitness of the population.
How does the process of substitution mutation impact genetic diversity within a population?
Substitution mutation can increase genetic diversity within a population by introducing new genetic variations. This can lead to different traits and characteristics, potentially increasing the overall genetic variability of the population.
What mechanisms of evolution decreases the genetic diversity as a species?
Genetic drift, founder effect, and population bottlenecks are mechanisms that can decrease genetic diversity in a species. These mechanisms result in a reduction of variation within a population due to random events that affect the genetic makeup of the population.
What is the variety of genetic material within a species or population is called?
Genetic diversity refers to the variety of genetic material within a species or population. It includes different gene variations and DNA sequences present within individuals of the same species. Genetic diversity is important for a species' ability to adapt to changing environments and for the overall health and resilience of the population.
What characteristic do a bottleneck and a founder effect have in common?
The founder effect a genetic bottleneck are similar in their effect on the genetic diversity of a local population in both situations. They result in the development of a population from a small number individuals and is likely to have reduced genetic diversity.
How does standing genetic variation contribute to the overall genetic diversity within a population?
Standing genetic variation refers to the existing genetic differences within a population. This variation contributes to genetic diversity by providing a pool of different genetic traits that can be passed on to future generations. This diversity helps populations adapt to changing environments and increases their chances of survival.
How can introducing genetic diversity into a population enhance its overall genetic variation?
Introducing genetic diversity into a population can enhance its overall genetic variation by increasing the range of traits and adaptations available within the population. This can help the population better respond to environmental changes and challenges, improving its overall resilience and survival chances.
How does pure-breeding impact the genetic diversity of a population?
Pure-breeding can decrease genetic diversity in a population because it involves breeding individuals with similar genetic traits, leading to a limited gene pool and potentially increasing the risk of genetic disorders.
What does Variations in genotype through an entire population describes?
Variations in genotype through an entire population describe the diversity of genetic traits and characteristics found among individuals within a group. These variations can be caused by processes like genetic mutations, genetic recombination, and natural selection, resulting in differences in physical appearance, behavior, and other traits within the population.
What is interbreeding and how does it impact genetic diversity in biological populations?
Interbreeding is the mating between individuals of different species or populations. It can increase genetic diversity by introducing new genetic variations into the population. However, excessive interbreeding can lead to a loss of genetic diversity and potentially reduce the population's ability to adapt to changing environments.
What explanation does science give about how the Mouflon found on an island in the Indian Ocean were able to maintain their genetic diversity under extraordinary circumstances?
Dr. David Coltman, an evolutionary geneticist at the University of Alberta, says that although the models of genetic drift predict the genetic diversity of the Mouflon should have been lost over time. The genetic diversity of the Mouflon has been maintained because "natural selection is more important to the evolutionary process than is commonly believed," according to Dr. Coltman. The extreme conditions of the island are thought to have prevented genetic drift because of the premium advantage the more genetically diverse mouflon on the island hold over their less genetically diverse cousins.
