The phenotype of organisms determines the way they interact with one another and with their environment. The way organisms interact with one another and with their environment determines how well each organism is able to compete for resources and mates - what the chances are of that organism successfully raising fertile offspring, in other words. Such offspring will likely carry the genes that give them their parent's successful phenotype. So over the generations, the genes that produce such successful phenotypes will become more numerous in the population, causing a shift in the average of phenotypes towards this successful phenotype.
With genetic engineering, we can select the genes that we, humans, wants and discard those that we don't need. We speed the process of natural selection in some aspect but in other aspect we go against natural selection because those genes that we select might not be able to survive in the wild. This is why it's has been coined Artificial Selection.
Possibly. Remember, evolution is the change in allele frequency over time in a population of organisms. So, an artificially selected organism, selected by genetically engineering it germ line alleles, would pass on these changes in allele frequency and this would be evolution.
Teosinte to corn. All by artificial selection of plants, teosinte plants, that had certain mutations that growers found beneficial. Then these plants were mated, which is the natural genetic modification that lead, eventually, to corn. Corn evolved under the driver of artificial selection.
Now, we can modify plants directly in their genomes. Golden rice is one example of this. Vitamin A production increasing genes are inserted into the genome of normal long grained rice and this is a form of evolution drive by genetic modification. The alleles have changed in this plant, so evolution has occurred.
If genetic cures were discovered, we could stop diseases and afflictions altogether by giving the cure to the parent, and the offspring may have a better chance of fighting off the disease.
phenotype
Enviroment, development, and behavior are all factors besides alleles that can affect phenotypes.
Natural selection favours phenotypes that bestow a reproductive advantage, thereby increasing the frequency of alleles (genotype) producing those phenotypes.
Highly reduced, or, nonexistent.
by natural selection.
Natural selection is something that happens over time and is somewhat dependent on the conditions of climate and environmental changes. There are times when natural selection can favor different phenotypes, if and when the culture starts to seek out others with certain traits and characteristics to breed.
Enviroment, development, and behavior are all factors besides alleles that can affect phenotypes.
Natural selection favours phenotypes that bestow a reproductive advantage, thereby increasing the frequency of alleles (genotype) producing those phenotypes.
Highly reduced, or, nonexistent.
by natural selection.
This is backward, natural selection works on genotype not phenotype.
When natural selection favors the intermediate version of a characteristic, it is referred to as stabilizing selection. It is the opposite of disruptive selection.
It doesn't. Phenotypes are viable or not in a given environment, and this influences whether the corresponding genotypes get passed on. Selection works on genotypes via the effects of their expression, their phenotype. The answer you may be looking for is that phenotypes maladapted to their environment have less babies, and pass on less copies of their genes. "Natural selection" is the whole process over generations. "Selection" may refer to misadapted bodies/phenotypes reproducing less due to illness, hunger, bad quality territories, dying earlier, etc.
Natural selection is something that happens over time and is somewhat dependent on the conditions of climate and environmental changes. There are times when natural selection can favor different phenotypes, if and when the culture starts to seek out others with certain traits and characteristics to breed.
Indirectly, yes it does. But it can only act on genotypes through their phenotypes.
Natural selection
yes it is highly possible
I would make the graph narrower.