The creation of a stop codon in the middle of a coding sequence<br/>within the gene is a:() A: missense<br/>mutation; B: frameshift<br/>mutation; C: nonsense<br/>mutation; D: point<br/>mutation; E: silent<br/>mutation.
The creation of a stop codon in the middle of a coding sequence<br/>within the gene is a:() A: missense<br/>mutation; B: frameshift<br/>mutation; C: nonsense<br/>mutation; D: point<br/>mutation; E: silent<br/>mutation.
名词解释：reverse mutation
名词解释：reverse mutation
突变热点(hot spots of mutation)
突变热点(hot spots of mutation)
Amino acid sequence of the encoded protein is not changed in A: Silent mutation B: Acceptable mis-sense mutation C: Both (A) and (B) D: None of these
Amino acid sequence of the encoded protein is not changed in A: Silent mutation B: Acceptable mis-sense mutation C: Both (A) and (B) D: None of these
条件致死突变（conditional lethal mutation)
条件致死突变（conditional lethal mutation)
The anti-UV mutation of microorganisms must be induced by ultraviolet rays
The anti-UV mutation of microorganisms must be induced by ultraviolet rays
The<br/>anti-UV mutation of microorganisms must be induced by ultraviolet<br/>rays.(<br/>)
The<br/>anti-UV mutation of microorganisms must be induced by ultraviolet<br/>rays.(<br/>)
Cancer is the result of__________ the genes responsible. A: mutation B: heredity C: sponso D: attendant
Cancer is the result of__________ the genes responsible. A: mutation B: heredity C: sponso D: attendant
Fruit tree radiation mutation breeding often uses pollen as the test material, because it is not easy to produce chimeras.
Fruit tree radiation mutation breeding often uses pollen as the test material, because it is not easy to produce chimeras.
Minor changes of HA are called A: Gene mutation B: Gene reassortment C: Antigenic shift D: Antigenic drift
Minor changes of HA are called A: Gene mutation B: Gene reassortment C: Antigenic shift D: Antigenic drift