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Where Natural selection favored alleles for increased melanin production in human living?
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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.
How is kin altruism related to natural selection?
Kin altruism is the tendency to behave in such a way as to provide benefit to a close relative at personal cost. One might think of sharing food, or calling out when a predator approaches. Natural selection is the differential replicative success of alleles. If one considers altruistic behaviour as (influenced by) the expression of a complex of alleles, then it is easy to see how aiding organisms that share most of your alleles (ie. relatives) would cause those alleles to spread throughout the population gene pool at an increased rate. In this manner, altruism could evolve as a result of natural selection acting on 'selfishly' replicating genes.
How are phenotypes and genotypes related to natural selection?
Natural selection favours phenotypes that bestow a reproductive advantage, thereby increasing the frequency of alleles (genotype) producing those phenotypes.
Do humans have alleles?
It's the other way around: natural selection is the natural process that causes the frequencies of occurence of alleles in the population gene pool to shift.
What factor besides alleles affect phenotypes?
Enviroment, development, and behavior are all factors besides alleles that can affect phenotypes.
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.
How do alleles influence natural selection?
It's the other way around: natural selection is the natural process that causes the frequencies of occurence of alleles in the population gene pool to shift.
Natural selection causes the frequency of favorable alleles to?
Increase.
Which is a process that eliments harmful alleles from a gene pool?
natural selection
Does a homozygous alleles help more than a heterozygous to the natural selection?
yes it does :))
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.
How is kin altruism related to natural selection?
Kin altruism is the tendency to behave in such a way as to provide benefit to a close relative at personal cost. One might think of sharing food, or calling out when a predator approaches. Natural selection is the differential replicative success of alleles. If one considers altruistic behaviour as (influenced by) the expression of a complex of alleles, then it is easy to see how aiding organisms that share most of your alleles (ie. relatives) would cause those alleles to spread throughout the population gene pool at an increased rate. In this manner, altruism could evolve as a result of natural selection acting on 'selfishly' replicating genes.
How do natural selection cloning and selective breeding lead to evolutionary change?
The only thing that causes evolution is Mutations due to forced natural selection of desired alleles.
Is this true Natural selection cannot operate efficiently against rare recessive alleles?
True
How is sickle cell alleles maintained through natural selection?
Heterozygous induviduals pass the dominant and recessive alleles to offspring
How are phenotypes and genotypes related to natural selection?
Natural selection favours phenotypes that bestow a reproductive advantage, thereby increasing the frequency of alleles (genotype) producing those phenotypes.
Does natural selection on single-gene trait cannot lead to changes in allele frequencies?
Natural selection on a single-gene trait can lead to changes in allele frequencies for the alleles of that gene.
