0
- Directional selection: favors the phenotype at one extreme of a trait's range, selecting against the opposite extreme.
- Stabilizing selection: favors the intermediate phenotype, selecting against the phenotypes at both extremes of the trait's range.
- Disruptive selection: favors phenotypes at both extremes, selecting against the intermediate phenotype of the trait's range.
Wiki User
∙ 13y ago
Wiki User
∙ 14y agoNatural selection changes the genetic makeup of a population by favoring some genotypes over others. It does so through the differential reproduction of those genotypes. Put simply, if I possess a variant of a trait (and the genotype underlying it) which allows me to leave behind more adult offspring than those with different variants of that trait, then my variant will become more common in the population than the others. The result is a change in the frequency of the gene variants: mine increases in frequency at the expense of the others. This change in the frequency of gene variants (known as alleles) over time in a population is the basic definition of evolution itself.
Wiki User
∙ 10y agoThe three ways that natural selection can affect the distributions of a phenotype are that organisms and their offspring have a variation in their phenotypes and genotypes, favorable variations survive and are passed on to offspring, and, organisms reproduce more offspring than could possibly survive.
Wiki User
∙ 13y agoThe three ways natural selection can affect a population is through directional selection, stabilizing selection, and disruptive selection.
Wiki User
∙ 13y agoIt decreases variation in a population as certain traits are selected for by the environment.
Add your answer:
Earn +20 pts
What are three ways that can lead to speciation?
by natural selection, genetic drift and geographical isolation
How do humans affect the biosphere?
Humans affect the biosphere in numerous ways. One of the most common ways in which humans impact the biosphere is by their extraction of Natural Resources. Growth and expansion is another way in which humans affect the biosphere.
What are some ways to prove evolution is wrong?
Evolution, the change in allele frequency over time in a population of organisms, is a fact. Show evidence that this does not happen. I think you would find that very difficult to show since change in allele frequency is so easy to observe. Now, to show that the theory of evolution by natural selection is wrong, you must come up with a better explanation of evolution. So far no one has done that.
How does a predation affect natural selection?
Predation can affect biodiversity in two ways. In a positive way, predation allows for the biodiversity in an area to flourish, meaning that certain animals/plants being kept 'in check' will allow for other plants and animals to flourish. In a negative way, however, predation can decimate certain aspects of an area - such as a certain plant or animal, and this can affect the entirety of the food web for the area.
How can human activty directly affect the size of a plant population?
We grow plants to eat, we harvest plants, we pollute the land killing plants, we cut down plants to use as raw materials (wood for example), we clear areas of plants to build/grow cities... We affect plant populations in many ways.
What are the three ways natural selection can affect the distribution of phenotype?
Blah
What is the relationship between adaptation and natural section?
Here is a quote: "The relationship between adaptation and natural selection does not go both ways. Whereas greater relative adaptation leads to natural selection, natural selection does not necessarily lead to greater adaptation." I do not recall who said it, but this is what the relationship between both is. Here is a quote: "The relationship between adaptation and natural selection does not go both ways. Whereas greater relative adaptation leads to natural selection, natural selection does not necessarily lead to greater adaptation." I do not recall who said it, but this is what the relationship between both is. Here is a quote: "The relationship between adaptation and natural selection does not go both ways. Whereas greater relative adaptation leads to natural selection, natural selection does not necessarily lead to greater adaptation." I do not recall who said it, but this is what the relationship between both is.
What are the different ways in which individuals with a particular trait may increase in a population?
Individuals with a particular trait may increase in a population through natural selection, genetic drift, gene flow, and mutations. Natural selection favors individuals with advantageous traits, genetic drift leads to random changes in allele frequencies, gene flow introduces new alleles into the population, and mutations create new genetic variation.
In what ways was Darwin an important scientist?
he discovered natural selection and the theory of evolution
What are the 5 ways a population can evolve?
A population will most likely evolve when there is a small population, mutations exists, natural selection may take place, nonrandom mating occurs, and/or gene flow may occur. Sexual selection, genetic drift, Gene flow, Mutation, and natural selection are five ways a population can evolve. Sexual selection is natural selection arising through preference by one sex for certain characteristics in individuals of the other sex. Genetic drift is variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce. Gene flow is the transfer of alleles or genes from one population to another. Mutation is the changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes. Natural selection is the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution.
What are three ways that can lead to speciation?
by natural selection, genetic drift and geographical isolation
Which of the following was not part of Darwin's theory of natural selection?
A: More offspring are produced within a population of a species than can generally survive. B: More offspring are produced within a population of a species than can generally survive. C: Some individuals possess features that increase their probability to survive compared to individuals lacking these features. D: Some individuals possess features that increase their probability to survive compared to individuals lacking these features Individuals in a population of a species vary in many ways Individuals in a population of a species vary in many ways Changes in the environment cause beneficial mutations.
How does natural selection affect cheetahs?
Genetic drift has reduced the polymorphism of the cheetah population. The cheetahs probably underwent a "genetic bottleneck" a few thousand years ago, when the population was reduced to just a few individuals. Then as they reproduced, all surviving cheetah offspring were closely related.
What are three ways natural selection can effect the polygenic traits?
i really like peanut butter jelly
How do humans affect the biosphere?
Humans affect the biosphere in numerous ways. One of the most common ways in which humans impact the biosphere is by their extraction of Natural Resources. Growth and expansion is another way in which humans affect the biosphere.
What are 5 ways that natural disaster affect human life?
u stupid
What are three ways bacteria may win the battle against the phages?
-natural selection -restriction enzymes -lysogeny
