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pros- can clarify diagnosis's, find diseases, can get rid of a disease, prenatal testings, find out your future, and its all confidential cons- can have labratory errors, expensive, emotional, most insurance doesnt cover the costs, can have implications on the family, could potentially be used to create a bigger divide between the upper and working classes by form of modern eugenics
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How does genetic variation support Natural Selection?
Genetic variation in itself does not 'support' natural selection: it is what natural selection acts upon.
When individuals with an average form of a trait have the highest fitness?
Stabilizing selection
How is genetic diversity important to the concept of natural selection?
Without genetic diversity, natural selection cannot occur
What is stabilizing evolution?
A mechanism (most common) of natural selection where overall genetic diversity decreases due to particular trait or genotype getting 'fixed' into the population. It is usually represented as a parabola on a graph.
What characteristic within populations cause natural selection to occur?
Genetic variation. If there were no variation in the genes/phenotype then natural selection would have nothing to select from.
What is natural selection that acts against one type of extreme form of a polyygenic trait to reduce genetic variation and change the average value of a trait within a population called?
Stabilizing selection is the type of natural selection that acts against extreme forms of a polygenic trait to reduce genetic variation and maintains the average value of the trait within a population. It favors the intermediate phenotype, leading to a narrowing of the range of variation for that trait over time.
Natural selection can only act upon a certain trait if the trait is?
Heritable, meaning that it can be passed down from one generation to the next through genetic inheritance. Without a genetic basis, natural selection would not be able to change the frequency of that trait in a population over time.
What terms describes natural selection that acts against intermediate forms of a polygenic trait to increase genetic variation while not changing the average value of a trait within?
Disruptive selection
What correctly explains how a favorable genetic trait can increase in frequency in a population?
A favorable genetic trait can increase in frequency in a population through natural selection, where individuals with the trait have higher reproductive success. This allows them to pass on the trait to more offspring, leading to an increase in the trait's prevalence over time.
The type of selection in which individuals at one end of a curve have the highest fitness is called?
Directional selection. In this type of selection, the advantageous trait in a population shifts towards one extreme as individuals with that trait have higher fitness and are more likely to survive and reproduce.
What is Stabilizing Selection and Distruptive selection?
Stabilizing selection is a type of natural selection that favors the intermediate phenotypes in a population, leading to a decrease in genetic diversity. Disruptive selection, on the other hand, favors extreme phenotypes over intermediate ones, resulting in increased genetic variation within a population.
What are the different ways in which individuals with a particular trait may increase in a population?
different ways in which individuals with particular trait may increase are -if that particular trait provides them with some sort of support to undergo the circumstances they are found in, we can also call it natural selection -or due to any genetic drift, that is a natural calamity, also called a chance selection
What is the cause of stabilizing selection?
The type of selection that removes the fringe from both ends of phenotype distribution and establishing a means or average. Genetic diversity decreases and there is a stabilization on a particular trait.
How does the breeder's equation explain the relationship between genetic variation and the selection of desirable traits in breeding programs?
The breeder's equation explains how genetic variation influences the selection of desirable traits in breeding programs. It states that the response to selection for a particular trait is determined by the genetic variation for that trait and the strength of selection pressure applied. In breeding programs, breeders aim to increase the frequency of genes associated with desirable traits by selecting individuals with those traits to be parents of the next generation. This process helps to improve the overall genetic quality of the population over time.
Did natural selection give rise to our ability to drive automobiles?
No, our ability to drive automobiles is not a trait that has evolved through natural selection. Driving is a learned skill and is not influenced by genetic traits that are subject to natural selection.
What are causes for mutations?
Differences in the genetic code that lead to advantages above other members of the species. Thus if it is a valued trait it will be passed on.
Which trait, if either, is likely to respond to selection?
Traits that are heritable are more likely to respond to selection, as they can be passed down from one generation to the next. Non-heritable traits are less likely to respond to selection, as they are not influenced by genetic factors.
