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Assume you have a population of people of various genetically influenced heights; they all varied in height potential. They all were raised in an environment that was deprived of basic nutrients and all were somewhat stunted in growth. A person that would have been tall in a normal environment passes on those genes for tallness in his deprived -of -nutrients environment, so his sons/daughters, if properly feed, would grow tall. So you see, natural selection must work on the genetic/individual variation and not variations that are not inherited.
What else can I help you with?
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 are the three patterns of of natural selection?
The three patterns of natural selection are directional selection, stabilizing selection, and disruptive selection. Directional selection favors individuals at one extreme of a trait distribution, stabilizing selection favors the intermediate phenotype, and disruptive selection favors individuals at both extremes of a trait distribution.
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.
What is disputive selection?
Disruptive selection is a type of natural selection that favors extreme traits over the average trait, leading to the divergence of characteristics within a population. This process can result in the formation of two distinct phenotypic groups with reduced variation between them.
Could the zygote ever obtain a heritable trait that it did not get from it's parents?
Yes, because a trait can be hidden for one generation and return in the next. For example, if a girl had red hair, but neither of her parents had red hair, she could have inherited from her grandparents. Therefore, it can be inherited from someone other than your parents.
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.
How does natural selection favor an organism's heritable trait?
Natural selection favors a trait by increasing its frequency in a population. Natural selection is differential reproductive success. If one variant of a trait enables an organism to have and raise more offspring successfully than other variants in a particualr environment, then it will become more common in the population.
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.
How could this be an advantage to the insects how could this trait have evolved through natural selection?
Well this could be an advantage to the insects because the insects can conceal with the color of the sticks. This trait could have evolved the through natural selection because its a chance of staying alive.
What are the three patterns of of natural selection?
The three patterns of natural selection are directional selection, stabilizing selection, and disruptive selection. Directional selection favors individuals at one extreme of a trait distribution, stabilizing selection favors the intermediate phenotype, and disruptive selection favors individuals at both extremes of a trait distribution.
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.
Through natural selection a trait that is favorable will become an alternate trait that is less favorable?
more frequent than
What four conditions must be present for natural selection to result in a difference in reproductive success?
Variation: There must be genetic variation for a particular trait within a population. Inheritance: The trait must be heritable and passed down from one generation to the next. Differential reproductive success: Individuals with a certain trait must have higher reproductive success than those without it. Selection pressure: Environmental factors must exert pressure favoring individuals with the advantageous trait, leading to its increased frequency in the population over time.
What determines which trait will be passed on to the next generation in the greatest frequency?
natural selection
How can organisms be produced with desired trait?
Through selective breeding or by natural selection.
What characteristic witin populations causes natural selection to occur?
The characteristic within the population that causes natural selection to occur is that individuals within a given population are not all identical because they vary. The other characteristic that causes natural selection to occur is that some variants are better than the others.
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.
