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In the base sequence of the DNA part of the DNA changes which causes a change in the whole DNA which is called a mutation.
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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.
Can somatic mutations occur in sex chromosomes?
No, they occur in the organism's body cells and cannot be inherited by the offspring .
Mutations that occur in body cells will always be life threatening to the organism?
Incorrect.
Is mutations that occur in body cells will always be threatening to the organism?
yes, true.
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.
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.
Mutations that occur at random are called?
Mutations that occur at random are called spontaneous mutations.
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.
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?
mutation can affect an organism's offspring
Will mutations that occur in body cells will always be life threatening to the organism?
Not necessarily. Some produce cancers but many are noncancerous.
What is the result if mutations occur during meiosis?
The offspring of the organism will have a mutation.
What are known as gene mutations and occur at a single point in the DNA sequence?
Mutations that occur at a single point in the DNA sequence are Point Mutations.
