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If a mutation occurs, if itbeneficial in the slightest, natural selection chooses it to become the more common gene, and thus evolution takes place. For example the black death wiped out one in three Europeans, now scientists are finding that some of those who survived had mutations on their immune system cells; they lacked common receptors, or otherwise had few. (DNA is like history, clearly they aren't meeting with black plague patients, the DNA in Caucasian Europeans acts as a historical map of past bottlenecks.) Because Europeans with this mutation were least likely to die of the black death they were the most likely to survive, which is why the catastrophe of the Bubonic Plague resulted in some 20% of Caucasian European descendants to lack these receptors on their immune system cells which in turn helps reduce the risk of immunity diseases such as aides.
Wiki User
∙ 15y ago
Wiki User
∙ 13y agoIf the mutation gives the organism a trait that is better that what might normally exist, that organism is more likely to survive, and thus reproduce. Eventually, once this happens over and over again, the whole population might get the trait, because it was better in their environment.
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How can mutation affect evolution?
Mutation can serve up the raw variation that natural selection selects from, thus alleles are changed over time in populations of organisms; evolution.
What events may have lead to genetic changes over time?
Mutation can lead to genetic changes over time!
Why are mutation and recombination important in the process of natural selection and the evolution of organisms?
When a mutation occurs in the replication process, it changes certain features, like maybe better eyesight, and maybe bigger eyes, or bigger claws, and the meaning of evolution is when something changes into a better form.
What is the process in which DNA changes to form new alleles?
Crossing-over
How do organisms respond to long term changes in the environment?
They Began to Adapt to the changes over a certain period of time
Which property of life is responsible for changes seen in organisms over time?
Evolution
A group of organisms that changes over time is said to?
This describes the process of evolution. When organisms evolve, they change over time in a way adaptive to their current environment.
What are some ways various ways that generic variation can be introduced in organisms that reproduce?
By crossing over, hybridization, mutation and artificial gene transfer.
How does heritability affect natural selection?
Without the heritability of individual traits what difference would it make if the individual was selected. An individual that has a germ line mutation, say, and this mutation could confer survivability and reproductive success on progeny thus passes this mutation to said offspring is selected. Then evolution, the change in allele frequency over time in a population of organisms, could take place. Heritability is all as individuals are selected but populations evolve.
What is prerequisite for evolution?
That organisms vary, by sexual recombination or mutation. That some organisms will be better at survival and reproduction so that their alleles are passed on to progeny and these causes a change in frequency of these alleles over time which is the definition of evolution.
When does a mutation have the most impact on allele frequency?
There is no gene flow - APEX
How is DNA used in evidence for evolution?
DNA holds all the genetic code for the development of an organism. Mutations in the genetic coding causes traits in the organism to change. A change in environment allows the organisms with beneficial mutations to live on and pass on their genes to later generations while organisms with harmful mutations die off. Over time the organisms will have adapted to their environment, this is the process called Natural Selection.
