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Polygenic traits occur because of genes and environment. There are usually two or more genes involved in these traits. It also takes into consideration where the organism lives, for example the fact that some hotter areas have a history of people with darker skin tones.

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What are ways in which natural selection operates on ploygenic traits?

Polygenic? Natural selection usually acts on the phenotype of polygenic traits as they are suites of genes acting in concert to form a trait. If you had a trait, such as height, in two variant brothers then the aggregate would need to be selected for as the genes working in concert, but not equally well, would render different heights in the brothers which would be then visible to natural selection.


What are three ways natural selection can effect the polygenic traits?

Natural selection can lead to individuals with certain combinations of polygenic traits having higher fitness, increasing their likelihood of passing on their genes to the next generation. It can drive the frequency of alleles that contribute to favorable trait combinations up or down in a population over time. Natural selection can influence the distribution of phenotypic variations for polygenic traits, favoring those that provide a survival or reproductive advantage in a specific environment.


What happens to unnecessary traits during the process of natural selection?

How does natural selection affect undesirable traits?


Traits that are shaped by many genes are called what?

Traits that are produced by the interaction of several genes are called polygenic traits. Examples of polygenic traits are height and skin color.


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.


Is a frog an example of natural selection?

No, a frog is not an example of natural selection itself. Natural selection is a mechanism for evolution that acts on populations of organisms over generations, influencing the traits that are passed on to the next generation. Individual organisms like a frog can be impacted by natural selection, depending on their traits and how those traits affect their survival and reproduction.


What is a polygenic selection?

Polygenic selection refers to the process by which multiple genes across the genome contribute to the selection of a particular trait or phenotype. This type of selection can result in a continuous distribution of phenotypic traits within a population. It is common in complex traits like height or intelligence where multiple genetic loci interact to influence the outcome.


Is natural selection responsible for inherited traits?

no, inherited traits are responsible for natural selection


WHAT NATURAL SELECTION CAN ONLY ACT ON WHICH TRAITS?

Natural selection can only act on traits that have a genetic basis, meaning they are heritable and can be passed from one generation to the next. These traits must also affect an organism's fitness, influencing its ability to survive and reproduce in its environment. Additionally, natural selection operates on phenotypic traits, which are the observable characteristics resulting from the interaction of genetics and the environment. Traits that are not expressed or that do not impact survival and reproduction are not subject to natural selection.


How does environmental pressure affect natural selection?

When nothing happens to exert strong population pressure on that population, natural selection favors the allele frequency already present. When mutations cause new traits, natural selection weeds these traits out because they're not as efficient as the others.


What is the opposite of polygenic trais?

The opposite of polygenic traits is monogenic traits. Polygenic traits are determined by the interaction of multiple genes, while monogenic traits are controlled by a single gene.


What is polygenic selection?

Polygenic selection refers to the process by which multiple genes contribute to a single trait, influencing the genetic variation within a population. Unlike traits governed by a single gene, polygenic traits are often quantitative and can be affected by environmental factors. This type of selection can lead to gradual changes in traits over generations, as advantageous combinations of alleles become more common. Examples include height, skin color, and intelligence in humans, where many genes interact to shape the overall phenotype.