0
Synonymous mutations. These are mutations that happen in the coding regions of genes that change one nucleotide for another. However, because of redundancy in the genetic code (where one amino acid may be coded for by more than one nucleotide sequence) the amino acid sequence of the protein isn't altered.
Mutations that occur in non-coding, non-control regions of the genome also don't affect phenotype.
You may also wish to look at Wikipedia's entry on silent mutations.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoYes, a mutation can occur without affecting the phenotype at all. For example, a point mutation may change a nucleotide in a codon, but sometimes, the codon can still code the same amino acid, so the mRNA strand can still make the same protein.
Wiki User
∙ 12y agoTo create a protein, the DNA contains a code which is made up of A,T,C and G, for example:
AGCTAGCTAGCTA. Each 3 of these 'letters' (bases) make an amino acid, which then go together to make a protein.
If one of these bases is deleted or added, the whole code will change therefore creating different proteins.
However, if one of these is substituted with another base, there are 3 possibilities:
- One of the 3 bases (triplet code) codes for a different amino acid, changing the protein
- The letter which is replaced is the same or the code still codes for the same amino acid, so the protein will not be changed
- The part of the DNA sequence which has been changed does not code for anything (called an intron) therefore will not affect proteins
Wiki User
∙ 13y agochromosomal mutation
Add your answer:
Earn +20 pts
What is Phenotype O?
In regards to Blood Type, Phenotype O refers to Blood Type O as opposed to A, B, or AB.
What is the significance of mutations to living things?
Many, if not most, mutations are neutral, meaning that they have little or no effect on the expression of genes or the function of the proteins for which they code.
What effect does mutations have on variation?
genetic variation originates from mutations on which evolution depends on.
What is the phenotype that is present in most individuals in nature?
Wild type
What are the Different types of Mutations?
a bunch of stuff acxtually 4 major mutations to look at these go to Google and type in your question. if this does not work for you then sucks for you
Do mutations affect phenotype or genotype?
genotype always...phenotype sometimes
What is the conclusion of mutagenic effect of vodka on the phenotype of fruit fly?
some mutations include the change in eye color of the drosophila melanogaster
What do mutations cause in genotype and phenotype?
They cause changes or more technically alterations.
What is beneficial mutations?
Well, there is no specific type of mutation that is beneficial. They can be harmful, helpful, or have no effect at all.
Which mutation is the most dangerous?
There is no definite answer to this question many types of mutations can cause death and I'd say that's the most dangerous effect of a mutation. Large Scale mutations, like deletions or amplifications, usually cause the most damage because they effect whole chromosomes. Small Scale mutations are usually less dangerous because they only effect one gene. The worst small scale mutations are insertions and deletions because they change the reading frame. In my personal opinion, harmful mutations that occur in the tumor suppressor genes are the most dangerous because they are what prevent the mutations in cell from being duplicated and without them working a mutated cell can replicate uncontrollably.
How can you have the same phenotype but different genotype?
Different genotypes don't always change your phenotypes because of mutations
Can mutation beneficial?
Yes mutations are the basis of evolution as they provide variance in the phenotype that could have evolutionary advantages
Can an a positive baby be born to 2 o positive parents?
Not normally. There are mutations that occur rarely, which could cause this. Also, the Bombay phenotype appears to be type O unless specifically tested for, but it is not, so if one parent had it, they could have a type A or type B child.
Is hair a type genotype or a phenotype?
A phenotype. Phenotypes are observable, physical traits. Genotypes have to do with the genetic coding. Since hair type is visible, it is a phenotype.
Mutations in introns are less likely to affect phenotype then mutation in exons?
mutation in exons are less likely to affect phenotype then mutation in introns because mutaion in exons are silent mutation
Why are some mutation not harmful?
Some mutations can be deadly, harmful, or have no effect. Correct, not all mutations are harmful. Some mutations could even have a positive effect and help the creature adapt.
If a heterokaryon is made by crossing two mutants that have mutations in different genes of the adenine synthesis pathway the phenotype of the heterokaryon will be?
lethal
