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The distribution of phenotypes for a typical polygenic trait can often be expressed as?
a bell-shaped curve known as a normal distribution. This distribution shows the range of phenotypes in a population, with most individuals clustering around the average phenotype and fewer individuals at the extremes of the distribution.
What 3 types of Selection pressures that affect a population structure?
The 3 types of selection pressure on a population: 1) "Stabilizing selection" = intermediate phenotypes are favored and extremes on both ends are eliminated. 2)"Directional selection" = is a mode of natural selection in which a single phenotype is favored, causing the allele frequency to continuously shift in one direction. 3) "Disruptive selection/ Diversifying selection" = describes changes in population genetics in which extreme values for a trait are favored over intermediate values
A biotic or an abiotic resource in the environment that causes population size to decrease is a?
abiotic resource. Examples include environmental factors like drought, temperature extremes, or pollution that can directly affect the survival or reproduction of a population, leading to a decrease in population size.
What is Extremes of pH according to chemistry?
The extremes of the pH scale are 0 (acidic) and 14 (alkaline).
Compare and contrast stabilizing directional and disruptive selection?
Stabilizing selection is where a population is favored by just the right amount of a certain trait, and if they don't have the right amount of that certain trait then they die. Example: Human babies and birth weight, if the baby is too small, i gets sick. If the baby is too big, it cannot get through the pelvis; but just the right weight and it will come out lively and well. Disruptive selection is when an animal has to fit in with its environment; I.E., camouflage.
What is In a population a shift in the average population phenotype toward the mean and away from the physical extremes This process lowers phenotypic variety the population is more homogeneous?
It is regression. Galton coined the term in the course of his study on the heights of parents and their children. His conclusion was that tall parents tended to have tall children and short parents had short children, but that the children's height regressed towards the mean height for the population.
What is Digital Extremes's population?
Digital Extremes's population is 170.
The mode of natural selection in which both extremes in the range of a phenotype are favored is termed?
That would be disruptive selection.
What is decontinuous variation?
Variation within a population in which few or no intermediate phenotypes fall between the extremes.
The graphs of the 3 types of selection and label the average and the extremes?
In stabilizing selection, the average phenotype is favored, leading to a reduction in extreme phenotypes. In directional selection, one extreme phenotype is favored, causing a shift in the average towards that extreme. In disruptive selection, both extreme phenotypes are favored over the average, leading to a bimodal distribution in the population.
What are the 3 ways natural selection can affect a population?
Natural selection changes the genetic makeup of a population by favoring some genotypes over others. It does so through the differential reproduction of those genotypes. Put simply, if I possess a variant of a trait (and the genotype underlying it) which allows me to leave behind more adult offspring than those with different variants of that trait, then my variant will become more common in the population than the others. The result is a change in the frequency of the gene variants: mine increases in frequency at the expense of the others. This change in the frequency of gene variants (known as alleles) over time in a population is the basic definition of evolution itself.
The distribution of phenotypes for a typical polygenic trait can often be expressed as?
a bell-shaped curve known as a normal distribution. This distribution shows the range of phenotypes in a population, with most individuals clustering around the average phenotype and fewer individuals at the extremes of the distribution.
What 3 types of Selection pressures that affect a population structure?
The 3 types of selection pressure on a population: 1) "Stabilizing selection" = intermediate phenotypes are favored and extremes on both ends are eliminated. 2)"Directional selection" = is a mode of natural selection in which a single phenotype is favored, causing the allele frequency to continuously shift in one direction. 3) "Disruptive selection/ Diversifying selection" = describes changes in population genetics in which extreme values for a trait are favored over intermediate values
When was The Extremes created?
The Extremes was created in 1998.
How many pages does The Extremes have?
The Extremes has 393 pages.
When was The Age of Extremes created?
The Age of Extremes was created in 1994.
When was Digital Extremes created?
Digital Extremes was created in 1993.
