point mutation
a mutation that changes a single DNA base pair
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
Point mutation
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Point Mutation
A point mutation is when a single base pair is altered. Point mutations can have one of three effects. First, the base substitution can be a silent mutation where the altered codon corresponds to the same amino acid.
Point Mutation
Point mutations involve a single nucleotide, thus a single amino acid.
Point mutation
A mutation involving the substitution, addition, or deletion of a single base pair .
Point mutation A mutation affecting a single nucleotide pair. It can be used loosely to mean mutations affecting a very small number of nucleotide pairs (perhaps up to the insertion of a small mobile element such as an Alu element) or to the ...
Point mutation. A change in a single base pair of a DNA sequence in a gene. (See Mutation.)
Poly(A) polymerase. Catalyzes the addition of adenine residues to the 3' end of pre-mRNAs to form the poly(A) tail. (See Polymerase.) ...
Mapping Point Mutations Within A Gene
The relative order and spacing of any two point mutations in a single gene like rII can be done using the procedure describe in Bacteriophage Genetics.
Besides point mutations, what other ways can a gene can transform into an oncogene?
Point mutations
The most common type of copying error is the point mutation. In this form of mutation the nucleotide at a site is replaced by a different nucleotide.
point mutations A change in the structure of a gene that usually arises from the addition, deletion, or substitution of one or more nitrogenous bases.
A point mutation; the replacement of one nucleotide and its partner from the complementary DNA strand by another pair of nucleotides.
base-pairing principle ...
variable number of point mutations.
C.
number of copies of an internally repeated DNA sequence.
(See Point mutation.) Mutualism. See Symbiosis. Mycorrhizae. Fungi that form symbiotic relationships with roots of more developed plants. N National Institutions of Health (NIH).
The region is particularly valuable for functional studies because of the variety of genetic reagents, including overlapping deletions and point mutations, that are available.
Many viruses, in particular RNA viruses, have fairly high mutation rates (on the order of one point mutation or more per genome per round of replication in RNA viruses) and short generation times.
There are two pieces of supporting data for this: first, APP is overexpressed in Down's syndrome, which leads to ADlike neuropathology by the age of 40 in virtually all affected individuals; secondly, specific point mutations in APP cause some forms ...
Types of mutations include point mutations, deletions, insertions, and changes in number and structure of chromosomes. (Cf. polymorphism)
Related Terms:
Genotype ...
transition A type of point mutation in which one purine or pyrimidine is replaced by another base of the same type. Examples: A-G and C-T.
The term which De Vries introduced into biological literature for an abrupt change of genotype which is inherited. Any permanent and heritable change in DNA sequence. Types of mutations include point mutations, deletions, insertions, ...
Point mutations are the result of the substitution of a single base. Frame-shift mutations occur when the reading frame of the gene is shifted by addition or deletion of one or more bases.
A difference in restriction fragment length between individuals due to loss or gain of a restriction enzyme site due to point mutation, or insertion or deletion between consecutive sites. Normally detected by Southern blotting and probing.
 See also: Mutation, DNA, Sequence, Gene, Trans
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