Assertion (A): Sickle cell anaemia is an example of point mutation. Reason ( R): It is caused by addition or deletion of nitrogenous bases in the DNA or mRNA.
Substitution of a nitrogenous base pair in DNA causes frameshift mutation. The replacement of a purine by a pyrimidine is known as transition.
Nitrogen bases are
A class of mutation induced by addition or deletion of a nucleotide is called :-
Deletion of cetain genes cause
Assertion : Addition or deletion of a base from a gene produce entirely a new polypeptide. Reason : Substitution mutation replaace a single amino acid in a polypeptid.
Addition or deletion of a single nucleotide results in which type of mutation
Sudden addition or deletion of genes by chance in a small population is called
Nitrogenous bases present in DNA
Nitrogenous bases present in DNA
MOTION-PRINCIPLES OR INHERITANCE AND VARIATION-Check your concepts - 5
