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What type of selection may eliminate intermediate phenotypes?
Disruptive selection can eliminate intermediate phenotypes by favoring extreme phenotypes, leading to a bimodal distribution. This selection occurs when individuals with extreme traits have a higher fitness than those with intermediate traits, resulting in the reduction of the intermediate phenotype in the population.
Which kind of selection eliminates extreme phenotypes?
disruptive selection
Which phenotypes have higher fitness?
Phenotypes with higher fitness are those that increase an organism's chances of survival and reproduction in a given environment. These phenotypes may have traits that enhance adaptability, reproduction, or competitive advantage, allowing them to pass on their genes to the next generation more successfully. Ultimately, the fitness of a phenotype depends on how well it aligns with the specific environmental conditions and challenges it faces.
Describe three patterns of natural selection on polygenic traits Which one leads to two distinct phenotypes?
One pattern of natural selection polygenic traits is directional selection, in which one end of the spectrum leads to increased fitness and the other end decreased fitness. Disruptive selection is when both ends of the spectrum lead to increased fitness and the middle leads to decreased fitness and it leads to two distinct phenotypes being selected for. It's opposite is stabilizing selection, in which the middle has the best fitness and the two extremes have decreased fitness.
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 are the differences between directional selection and disruptive selection in the process of natural selection?
Directional selection occurs when individuals at one extreme of a trait have a higher fitness, leading to a shift in the population towards that extreme. Disruptive selection occurs when individuals at both extremes of a trait have higher fitness, leading to the population splitting into two distinct groups.
What selection favors organisms with phenotypes that are at one extreme rlative to the average phenotype?
Directional selection favors organisms with phenotypes at one extreme relative to the average phenotype. This occurs when individuals with traits at one end of a spectrum have higher fitness, leading to a shift in the population towards that extreme phenotype.
Which type of natural selection occurs when the extreme opposites in a phenotype range are selected?
Disruptive selection occurs when the extreme phenotypes in a population are favored over intermediate phenotypes. This can lead to the divergence of a population into two distinct groups with different traits.
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.
Selection occurs when the environment continually eliminates extremes at both ends of a range of phenotypes?
Selection refers to the process by which certain traits become more or less common in a population over time, based on their impact on survival and reproductive success. In this case, the environment acts as the selective pressure by favoring intermediate phenotypes and reducing the presence of extreme phenotypes. This can result in the gradual evolution of populations towards a more optimal range of phenotypic variations for survival and reproduction.
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
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.
