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When individuals at only one end of a bell shaped curve of phenotype frequencies have high fitness the results is?
Directional Selection.
When individuals at only one end of the bell curve of phenotype frequencies have high fitness the result is?
Directional selection, where individuals with phenotypes at one extreme of the bell curve have a higher fitness compared to others. This can result in a shift in the population towards that extreme phenotype over generations.
Three ways natural selection picks a phenotype?
stabilizing selection: when individuals near the center of the curve have a higher fitness than individuals at either end of the cure, keeping the center at its current location but narrows the overall graph directional selection: when individuals at one end of the curve have a higher fitness than individuals at the other end, or middle, causing the entire curve to move as the character trait changes disruptive selection: when individuals at the upper and lower ends of the curve have higher fitness than individuals near the middle, causing the single curve to be cut into two These three types of selection are brought about by natural selection, so whichever one is favored, then the genes evolve in that specific direction. natural selection acts on the genotype, but the results are seen in the phenotype
When individuals near the center of the curve have higher fitness than individuals at either end of the curve?
Stabilizing Selection
What is individuals near the center of the curve have higher fitness than individuals at either end?
This concept refers to stabilizing selection, a type of natural selection where individuals with traits near the average have higher fitness compared to those with extreme traits. In this scenario, individuals at the center of the curve—representing the average phenotype—are more likely to survive and reproduce, as they are better adapted to the environment. This leads to reduced variability in the population, as extreme traits are selected against. Overall, stabilizing selection promotes the maintenance of common traits while filtering out less advantageous extremes.
What type of natural selection takes place when individuals at the upper and lower ends of the curve have higher fitness than individuals near the middle?
Disruptive selection.
What is a type of selection in which individuals at both ends of the distribution curve have higher fitness than those near the middle?
disruptive selection
What does a Graph look like showing phenotype distributions for stabilizing selection?
A normal curve. A Bell curve.
What is the type of selection in which individuals at one end of the distribution curve higher fitness than individuals in the middle of at the other end?
stabilizing selection
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 is the type of selection where individuals nears the center of a distribution curve have higher fitness than those at the extremes?
It's usually called stabilizing selection.
Does stabilizing selection favors average individuals?
Yes, stabilizing selection favors average individuals by selecting against extreme phenotypes and maintaining the status quo. It arises when individuals with intermediate traits have a higher fitness compared to those with extreme traits, leading to a reduction in genetic variation over time.
