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Natural selection doesn't directly occur in the genes or alleles. Natural selection occurs in the "real world", in which the organisms with the desirable traits are living, while the organisms with undesireable traits are dying or otherwise failing to reproduce. Nature is "selecting" these animals with useful traits, which survive to reproduce and pass on these genes.
The genes are what give animals the certain traits they need in order to survive. The individual alleles give the variation within a certain trait. For example, within the gene for fur color, there can be an allele for white, and an an allele for brown. The bunny that gets the brown allele will probably suvive in the wild. (Unless the environment is snow!)
What else can I help you with?
What role do alleles play in natural selection?
Genes are the medium by which inherited traits are passed on to offspring. It is inherited traits, and thus genes, that receive positive or negative selection.
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 level does natural selection occur at?
natural selection occurs when animals need it
What is the third step in natural selection?
There are really no steps in natural selection - just conditions required for it to occur.
Why would natural selection not occur in this poplutation?
What population? Perhaps you mean if there were no variation for natural selection to select from.
What role do alleles play in natural selection?
Genes are the medium by which inherited traits are passed on to offspring. It is inherited traits, and thus genes, that receive positive or negative selection.
Are new alleles made by natural selection?
No - natural selection does not create new alleles. Variation in alleles needs to exist in the population in order for natural selection to occur. Natural selection will involve the change in allele frequencies over time, but it does not create new alleles. New alleles are the result of mutations.
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 evolution is defined as any change in the relative frequency of what?
Evolution is defined as any change in the relative frequency of alleles (different forms of genes) in a population over time. This change can occur through processes such as natural selection, genetic drift, mutation, and gene flow.
What role do meiosis play in process of natural selection?
Meiosis plays a role in the process of natural selection by generating genetic diversity through the shuffling of genes during the formation of gametes. This genetic diversity contributes to variation within a population, which is crucial for natural selection to occur as individuals with advantageous traits are more likely to survive and pass on their genes to the next generation.
Why does recombination between linked genes continued to occur?
Recombination between linked genes can still occur because crossing over during meiosis allows for exchange of genetic material between homologous chromosomes. This process promotes genetic diversity by creating new combinations of alleles that can be inherited independently of each other. Additionally, the frequency of recombination between linked genes can be influenced by factors such as chromosomal structure and distance between the genes.
What does sex linked alleles mean?
Sex linked genes occur only on the X or the Y sex chromosomes.
What level does natural selection occur at?
natural selection occurs when animals need it
What is the third step in natural selection?
There are really no steps in natural selection - just conditions required for it to occur.
Why would natural selection not occur in this poplutation?
What population? Perhaps you mean if there were no variation for natural selection to select from.
Can someone help you compare and contrast natural selection and evolution any help would be great?
Evolution is simply genetic change within a poulation. That change can occur in several ways. One is immigration/emigration: individuals moving in or out of a population bring in or take out their alleles with them. Another is genetic drift, or chance events which cause the frequencies of alleles in a population to fluctuate. New mutations can change the allelic frequency as well. Finally, natural selection can cause some alleles to become more common at the expense of others. In short, natural selection is one of several mechanisms that can bring about evolution.
How is genetic diversity important to the concept of natural selection?
Without genetic diversity, natural selection cannot occur
