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Why natural selection acts on the phenotype rather than genotype?
Wiki User
∙ 8y ago
natural selection is a passive prosess . the mechanism of some individuals to be selected more than others is because they fit their environment more. and phenotype shows the fitness .
Wiki User
∙ 8y ago
Wiki User
∙ 12y agoThe phenotype is determined by the genotype. By selecting certain phenotypes, the corresponding genotypes are selected.
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What is natural selection also known as?
Survival of the fittest
What is meant by this statement Natural selection is an editing mechanism rather than a creative process?
Possible nothing. Natural selection produces combinatorial genes that work in amazing ways incrementally. The vertebrate eye, for instance. Naturally, those organisms that do not reproduce successfully are ' edited ', but selection works on the molecular level to make organisms not only fit, but fit enough.
What statement does NOT accurately describe natural selection?
Notably, the phrase 'survival of the fittest' is a particularly poor choice of words for describing natural selection, in my opinion. Mainly because, in the perception of the layman, it might be taken to mean that natural selection is a black-and-white phenomenon, always favouring more able variants, and that ability (fitness) is measured in terms of health, strength, intelligence, rather than ability to produce offspring. A far more accurate phrase would be: differential reproductive success - meaning the difference in numbers of surviving fertile offspring between variants.
How has natural selection affected humans?
Natural Selection Natural Selection Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations. Charles Darwin popularised the term "natural selection", contrasting it with artificial selection, which in his view is intentional, whereas natural selection is not.
What was Darwins catchphrase for the gradual evolution of new species?
Darwin didn't have a catchphrase for this, as far as I am aware. A famous catchphrase for natural selection that was coined by Herbert Spencer and used by Charles Darwin is "survival of the fittest". Unfortunately this catchphrase does a rather poor job of portraying the principle of differential reproductive success.
Why does natural selection work on organisms phenotypes rather than their genotypes?
This is backward, natural selection works on genotype not phenotype.
Why does natural selection act on phenotype rather than genotype of an organism?
This seems to be an odd question to ask... Unless I'm mistaken, the phenotype of a given organism is governed by its genotype, and changed a fair amount by the organism's environment. Consider the following circumstances: Organism A has a long set of arms, and has a "long arm" allele. Organism B has short arms and a "short arm" allele. For example, A's genotype has the "long arm" allele, and seen in its phenotype it has long arms. The converse is true for B. Judging by your usage of technical terms in your question, I'm sure I don't need to tell you that A will out-compete B, assuming they are in a food-is-up-high environment. So, A will end up with more offspring than B, again assuming that A and B are members of different species. Eventually organism A will become prevalent, and natural selection will have caused there to be more organisms with the "long arms" phenotype, and the "long arm" allele in their genotype. In summation, Genotype governs Phenotype, and the best geno- and phenotypes will be chosen by natural selection. By an organism having a superior phenotype, it also has a superior genotype.
Why does natural selection act on the phenotypes rather than the genotypes of an organism?
This seems to be an odd question to ask... Unless I'm mistaken, the phenotype of a given organism is governed by its genotype, and changed a fair amount by the organism's environment. Consider the following circumstances: Organism A has a long set of arms, and has a "long arm" allele. Organism B has short arms and a "short arm" allele. For example, A's genotype has the "long arm" allele, and seen in its phenotype it has long arms. The converse is true for B. Judging by your usage of technical terms in your question, I'm sure I don't need to tell you that A will out-compete B, assuming they are in a food-is-up-high environment. So, A will end up with more offspring than B, again assuming that A and B are members of different species. Eventually organism A will become prevalent, and natural selection will have caused there to be more organisms with the "long arms" phenotype, and the "long arm" allele in their genotype. In summation, Genotype governs Phenotype, and the best geno- and phenotypes will be chosen by natural selection. By an organism having a superior phenotype, it also has a superior genotype.
Dominance that occurs whenever the hybrid genotype produces a new intermediate phenotype?
When a heterozygous genotype (two different alleles) results in an intermediate phenotype, this is either codominance or incomplete dominance. If it is codominance, then both alleles are expressed together in the phenotype. If it is incomplete dominance, the two alleles produce a blended phenotype rather than both alleles being expressed together.
How is natural selection and evolution linked?
Natural selection is one of the 'guiding' principles of evolution.
Is combinations of alleles known as a genotype?
False. A combination af alleles is called a gene. The genotype is the type of gene (I.e blue eyes rather than brown eyes)
What is it when the presence of two different alleles results in an intermediate?
When a heterozygous genotype (two different alleles) results in an intermediate phenotype, this is either codominance or incomplete dominance. If it is codominance, then both alleles are expressed together in the phenotype. If it is incomplete dominance, the two alleles produce a blended phenotype rather than both alleles being expressed together.
What are variations in terms of evolution?
Normally variations might be differences in genotype between individuals. However, in evolution, the genotype isn't important; rather, the phenotype is what interacts with the environment. In other words, two organisms can have different genotypes (seeming variation), but be equally fit to survive because their phenotypes are the same. Therefore, variation in an evolutionary sense would be differences in phenotype, the outward appearance or function of a trait.
What are the mechanisms of natural selection?
Basically, natural selection, genetic drift and gene flow into and out of population of organisms.
Why is the species rather than the individual considered to evolve?
Evolution is a gradual process that occurs through natural selection. Natural mutation results in some offspring.
What is natural selection also known as?
Survival of the fittest
How might natural selection effect moose on isle royale?
The moose on Isle Royale are referred to as "meese", because they resemble mice rather than moose. Natural selection will eventually shrink these moose down and turn them into mice, making the ecosystem of isle royale FUBAR'ed.
