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Why might scientists say that genetic mutations are roots of all evolution?
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What was the other type of molecule that some scientists thought might carry genetic information?
protiens
What are three main ways that variations in genotype arise in population?
Variations occur due to mutations. There are three factors of mutations which impact the formation of new genotypes. 1) Point Mutations - Very small impact mutation which still might enhance the protection against environment and reproduction. 2) Mutations that alter Gene number and sequence - has major role in evolution as it might help to add new functions. 3) Mutation Rates - In animals and plants mostly very slow, however, prokaryotes due to high rate are able to mutate very fast.
How might the presence of a chemical mutagen affect the genetic size of a population over time?
It affects the population because mutations can be deadly and they're passed down from one generation to the next making the population shrink.
How does variation help or hurt an organism?
Mutations, or variations in genetic code that alter the structure of an organism, can in theory help a creature by allowing adaptation to its changing surrounding. However, genetic code can be rather delicate; many learning disorders are attributed to common, malignant mutations in genetic code.
What are some environmental factors that might result in point mutations?
nuclear exposure. >.<
Why might scientist study evolution?
A scientist may study evolution in order to understand current species of organisms, and what the future of said species may be. Evolution is a direct gateway from the past to the present allowing scientists to understand everything from genetic structures - to geographic activity.
How might the theory of evolution be used by scientists in their studies?
to explain the relationship
What was the other type of molecule that some scientists thought might carry genetic information?
protiens
What are 3 causes of variation within a population?
Changes within a gene pool occurring from generation to generation is called microevolution. Allele frequencies in a population may change due to gene flow, genetic drift, natural selection and mutation. These are referred to as the four fundamental forces of evolution. Only mutation can create new genetic variation...the other three forces simply rearrange this variation within and among populations.
Can somatic mutations lead to evolution?
Only indirectly. For instance, the propensity of certain genes in somatic cells to mutate can itself be the result of a mutation in the germ plasm of the ancestor. Such mutations would alter the behaviour of the cell (they might cause a form of cancer, or they might cause the immune system to behave in new ways), and would therefore be selected for or against, causing the frequencies of alleles that regulate this propensity for mutation to shift in a certain direction over the generations. Other than that, mutations in somatic cells have little to no effect on evolution.
Why might scientists want to obtain the DNA sequence of organisms other than humans?
Because that is how science works. Knowledge allows the building of other knowledge, and knowing how one organism's genetic structure works is important in the fields of medicine, evolution, microbiology, and pure research.
Isare the raw material of evolutionary change?
Mutations are essential to evolution. Every genetic feature in every organism was, initially, the result of a mutation. The new genetic variant (allele) spreads via reproduction, and differential reproduction is a defining aspect of evolution. It is easy to understand how a mutation that allows an organism to feed, grow or reproduce more effectively could cause the mutant allele to become more abundant over time. Soon the population may be quite ecologically and/or physiologically different from the original population that lacked the adaptation. Even deleterious mutations can cause evolutionary change, especially in small populations, by removing individuals that might be carrying adaptive alleles at other genes.
What proof is there for human evolution?
Well scientists believe that we evolved from the Apes, think of the era of the cave men that might give you some idea of what i mean.
How might viruses acutally help to cure genetic diseases?
A special type of virus, called a "retrovirus", can insert genes into someone's DNA. It could conceivably insert healthy genes to repair the mutations.
How might viruses actually help to cure genetic disease?
A special type of virus, called a "retrovirus", can insert genes into someone's DNA. It could conceivably insert healthy genes to repair the mutations.
What are three main ways that variations in genotype arise in a population?
Variations occur due to mutations. There are three factors of mutations which impact the formation of new genotypes. 1) Point Mutations - Very small impact mutation which still might enhance the protection against environment and reproduction. 2) Mutations that alter Gene number and sequence - has major role in evolution as it might help to add new functions. 3) Mutation Rates - In animals and plants mostly very slow, however, prokaryotes due to high rate are able to mutate very fast.
What are three main ways that variations in genotype arise in population?
Variations occur due to mutations. There are three factors of mutations which impact the formation of new genotypes. 1) Point Mutations - Very small impact mutation which still might enhance the protection against environment and reproduction. 2) Mutations that alter Gene number and sequence - has major role in evolution as it might help to add new functions. 3) Mutation Rates - In animals and plants mostly very slow, however, prokaryotes due to high rate are able to mutate very fast.
