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the founder affect.- got it from SI
What else can I help you with?
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.
Why is genetic variation among individuals beneficial for a population's overall health and survival?
Genetic variation among individuals is beneficial for a population's overall health and survival because it increases the likelihood that some individuals will have traits that allow them to survive and reproduce in changing environments. This diversity helps the population adapt to new challenges, such as diseases or environmental changes, reducing the risk of extinction.
How many breeding individuals are needed to maintain a genetically diverse population?
A genetically diverse population typically requires a minimum of 50 breeding individuals to maintain healthy genetic variation.
What is trait variation and can you provide an example to illustrate this concept?
Trait variation refers to the differences in characteristics or features among individuals within a population. This variation can be seen in traits such as height, eye color, or blood type. For example, in a population of sunflowers, some plants may have taller stems while others have shorter stems, demonstrating trait variation in the population.
How does the presence of high genetic variation in a population provide advantages compared to low genetic variation?
High genetic variation in a population provides advantages compared to low genetic variation because it increases the likelihood of individuals having diverse traits that can help them adapt to changing environments, resist diseases, and survive threats. This diversity allows for a greater chance of some individuals having advantageous traits that can be passed on to future generations, ensuring the population's long-term survival and success.
What type of gene flow allows reduction of variation?
Gene flow that involves the movement of individuals from a high-variation population into a low-variation population can result in a reduction of genetic variation. This can happen if the incoming individuals do not introduce new alleles or if genetic drift and selection reduce the frequency of existing alleles.
What movements of individuals into or out of a population provides a source of?
Migration of individuals into or out of a population provides a source of genetic variation. This movement introduces new genes into the gene pool, increasing diversity within the population.
What is the Difference among individuals in a population called?
genetic variation
A bell shaped curve of phenotypic variation is a representation of?
A bell shaped curve of phenotypic variation is a graphical representation of the distribution of a trait within a population. It shows that most individuals in the population have an average value for the trait, with fewer individuals on the extreme ends of the spectrum.
True or False When a population is in genetic equilibrium there is no genetic variation among individuals in that population?
True
Why is variation beneficial to a population that is undergoing change?
Yes, it is. If there is variation in a populations, and a sudden catastrophic event occurs, there is more of a chance that some of the individuals in the population will survive, and the population will not die out.
What are Darwin's four postulates?
1. There is variation in individuals within a species 2. Variation ensures that individuals that are better suited to their environment will survive. 3. Traits that assist individuals in survival and allow them to reprduce gradually spread throughout population. 4. Individuals produce more offspring than the local resources can support.
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.
How does variation in a species help the species survive?
As each new generation is produced, genetic variation may be introduced into a population. The more genetic variation in a population, the more likely it is that some individuals might have traits that will be advantageous if the environment changes.
Why is genetic variation among individuals beneficial for a population's overall health and survival?
Genetic variation among individuals is beneficial for a population's overall health and survival because it increases the likelihood that some individuals will have traits that allow them to survive and reproduce in changing environments. This diversity helps the population adapt to new challenges, such as diseases or environmental changes, reducing the risk of extinction.
How many breeding individuals are needed to maintain a genetically diverse population?
A genetically diverse population typically requires a minimum of 50 breeding individuals to maintain healthy genetic variation.
Why is genetic variation importmant?
Because it yields variation of characteristics within the population, allowing for the most fit individuals (those who can best survive and reproduce) to prosper.
