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Are mutations in the DNA sequence gene transient changes?
Successful mutations will persist. Mutations usually occur during replication. Some mutations will flourish depending on environmental factors.
Although genetic mutations may occur spontaneously in organisms the incidence of such mutations may be increased by?
Radioactive substances in the environment
Do all mutations in DNA coding for mrna cause a change in an organism?
No. Some mutations can be silent, meaning that they have different codes yet it produces the same protein. If it is a mutation for the start of a mRNA sequence, then the polypeptide will just be discarded if there is no AUG.
Are mutations predictable?
No, they are random, This means that they occur in no set numerical order. So, though they can not be predicted it is certain, with the mistakes made in replication and other factors, that they will occur.
What role do mutations play in natural selection?
Mutations may introduce novel phenotypes due to a change in DNA. If beneficial to the organism, the environment will continue to select that trait in future generations. However, most mutations are harmful to the organism, usually preventing the trait from passing to offspring.
Is mutations that occur in body cells will always be threatening to the organism?
yes, true.
Where do most mutations occur, and are they primarily random in nature?
Most mutations occur in the DNA of an organism, specifically in the genes. Mutations are primarily random in nature, meaning they can happen spontaneously and are not typically influenced by external factors.
Can more than one mutation occur in a single organism?
Yes, mutations can occur all over at the same time. For example in a multicellular organism a gamma ray or x-ray photon passing through the organism can generate one or more mutations in every cell that the photon passes through. Another example mutagenic chemicals can produce many mutations in every chromosome.
How do lethal mutations and neutral mutations differ?
Lethal mutations cause such a radical change that the organism cannot live with it and dies. A neutral mutation is a simple change that does not affect the organism in any way, such as a new eye colour.
Are mutations in the DNA sequence gene transient changes?
Successful mutations will persist. Mutations usually occur during replication. Some mutations will flourish depending on environmental factors.
Can somatic mutations occur in sex chromosomes?
Yes, somatic mutations can occur in sex chromosomes. These mutations can affect the genes located on the X or Y chromosome, leading to genetic changes in somatic cells, which are not passed on to offspring. Somatic mutations on sex chromosomes can impact an individual's health and development.
How can and organism produced by asexual reproduction be unique and different from its parent?
A organism can be unique and different from its parent when mutation occurs during DNA replication.
Can mutations result from a need?
No! This was a failed theory. Mutations always occur on a random basis ... the result of which is that most of them are down-right bad for the organism. (Remember, evolution is "directed" by death - NOT the survival of the fittest as is often stated.)
How are mutations returned to normal in an organism?
Mutations on recessive genes return to normal in an organism
What mutation affects an organism's offspring?
A genetic mutation is a change in an organism's DNA sequence that can be passed on to its offspring and affect their traits or characteristics. Mutations can occur spontaneously during DNA replication, or they can be triggered by external factors like radiation or chemicals.
Will mutations that occur in body cells will always be life threatening to the organism?
Not necessarily. Some produce cancers but many are noncancerous.
Why not all mutations are passed on to future offspring?
Not all mutations are passed on to future offspring because mutations occur randomly and may not affect an individual's reproductive cells. Additionally, some mutations may be harmful to the organism, reducing its chances of survival and reproduction. Finally, mutations that do occur in reproductive cells may not be passed on if the individual does not reproduce or if the mutation is not present in the germ line cells.
